Frankfurt Business Class

Kalender 31

The pointer date is the most classic display of the date on a wristwatch. A hand with a specially shaped tip points to the corresponding date. The numbers 1 to 31 are printed on the dial. This scaling does not harmonize with the 60 minute division of the watch. As the age of the month progresses, the scaling of the minute track and date diverge further and further - this disturbs the dial symmetry considerably and makes conventional wristwatches with pointer date more difficult to read. With the Kalender 31 and the mechanism used for the first time in a wristwatch, the designers at Guinand combine the traditionally elegant calendar display with a pointer with the innovative display of the 31st day of the month via an indicator window at 6 o'clock.

The Watch

Each of our watches claims to being something special. The Kalender 31 meets this requirement in several ways. A clearly legible and sporty, elegant watch with a unique date display.

For the first time in a wristwatch, a hand date with 30-day scaling and indicator display for the 31st day of the month was realized by a movement modification conceived and developed by Guinand.

Conceived, constructed and manufactured by hand in Frankfurt am Main. We proudly printed the name of our company's hometown on the dial.

The Dial

Stylish and easy to read, the galvanized, anthracite-colored dial with a sunburst finish and hour markers coated with white fluorescent paint.

The circular opening above the 6 o'clock hour mark offers a view of the deep red calendar indication on exactly one day a month. We took a deliberate decision against the historically inspired form and developed our own calendar pointer. If the pointer tip points to "30", the arrow-shaped counterweight at the end of the pointer points to the calendar indication window - so it is discreetly pointed out that the red calendar indication will indicate the last day of the month.

The Movement

The Kalender31 is powered by a GUI-1 automatic caliber. This movement is based on the SW220-1 of the Swiss family company Sellita from La Chaux-de-Fonds.

The movement is completely dismantled and modified at Guinand. At the depth of the movement, the base plate is prepared with millings and holes for the new calendar display. 10 additional components, including several gears and levers, implement the calendar display. We were able to do without external design, construction and manufacturing resources, all modifications are carried out entirely by Guinand.

The Calendar Indication

Calendar days 1-30 are displayed by the pointer moving at around midnight to the corresponding date. At the change of date from the 30th day of the month to the last day of the month, the calendar pointer remains at 12 o'clock and the indicator display at 6 o'clock changes to red. At the beginning of the month, the red disappears and the date pointer advances to 1. Fast setting of the date is made via the crown.

The Housing

A hand-made watch also requires a case made this way. The finely hand-brushed housing, screwed together from three housing parts, guarantees uncompromising safety. A slightly domed and anti-reflective sapphire crystal on the front and a flat sapphire crystal back ensure absolute suitability for everyday use.

The Strap

For the Kalender 31 we recommend our black Cordovan strap.

Pointer Calendar - rethought

The pointer date is the most classic display of the date on a wristwatch. A hand with a specially shaped pointer tip points to the corresponding date. The numbers 1 to 31 are printed on the dial. This scaling does not harmonize with the 60 minute division of the watch. As the month progresses, the scaling of the minute track and date spread further apart - this considerably disturbs the dial symmetry and makes conventional wristwatches with a pointer date more difficult to read.

With the Kalendar 31 and the mechanism used for the first time on a wristwatch, the designers at Guinand combine the traditionally elegant calendar display with a pointer with the innovative display of the 31st day of the month via an indicator window at 6 o'clock. There has never been such a function in a wristwatch - for the inventor of the basic idea and Guinand incentive to implement such a function with the means of classic watchmaking in a mechanical movement.

So the date hand is moving on once a day exactly two minute markers. The date hand in the middle of the month is exactly at 6 o'clock and not at 20 minutes after 5 o'clock as with conventional hand calendars.

Animation of the Calendar Indication

Model Configurator

Kalender 31

Frankfurt Business Class

Stylish and easy to read four-hands watch with a completely new date display

Current delivery time
on demand

Straps 20 mm

kalender31.1

Price: 1.790,00 € 1.504,20 € (VAT excl.)

incl. VAT, free shipping within Germany
For dispatch to countries outside the EU, VAT won't be charged.
VAT Refund when purchasing the watch directly in our sales plant.
Unless otherwise specified the delivery time is 2-3 weeks.
Kroko straps (reptile leather) cannot be shipped outside the EU

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User manual

Download user manual for chronographs (129.0 KiB)

Technical details

Movement

Calibre GUI-1 based on SW220-1
Self-winding mechanical movement
26 jewels
28.800 vibrations per hour; 4 Hz.
Movement diameter 11½ ‘‘‘ (25,60 mm)
Incabloc shock protection
Glucydur balance wheel
Bidirectional self winding, rotor with ball-bearing
Power reserve approx. 40 hours
Movement decorated with Perlage and Diamond snail
Rotor decorated with Côtes de Genève with engraved Guinand logo
Blued screws

Functions

Hours, minutes, center second
Pointer date and indicator display

Case

Stainless steel satinized
Sapphire crystal glass, domed, anti-reflective on the interior
Screwed back with sapphire crystal glass
Pressure resistant up to 10 bar

Dimensions and Weight

Case diameter: 42 mm / 1.65 inch
Case thickness: 11.4 mm / 0.49 inch
Band lug width: 20 mm
Lug-to-lug distance: 50.9 mm / 2 inch
Distance between the spring bars: 46 mm / 1.81 inch
Weight without strap: approx. 70 grams

Straps 20 mm

Leather Strap Arizona

Cases 20 mm	Type 40	Type 60	Type 31	Type 155
ideal wrist circumference in mm	190 mm	185 mm	191 mm	186 mm
ideal wrist circumference in inch	7.5 in	7.3 in	7.5 in	7.3 in
max. wrist circumference in mm	210 mm	205 mm	211 mm	206 mm
max. wrist circumference in inch	8.3 in	8.1 in	8.3 in	8.1 in
min. wrist circumference in mm	170 mm	165 mm	171 mm	166 mm
min. wrist circumference in inch	6.7 in	6.5 in	6.7 in	6.5 in

Wrist circumference specifications are approx. values and depend on the individual wearing habits.

Leather Strap Cordovan

Cases 20 mm	Type 40	Type 60	Type 31	Type 155
ideal wrist circumference in mm	189 mm	184 mm	190 mm	185 mm
ideal wrist circumference in inch	7.4 in	7.2 in	7.5 in	7.3 in
max. wrist circumference in mm	209 mm	204 mm	210 mm	205 mm
max. wrist circumference in inch	8.2 in	8.0 in	8.3 in	8.1 in
min. wrist circumference in mm	166 mm	161 mm	167 mm	162 mm
min. wrist circumference in inch	6.5 in	6.3 in	6.6 in	6.4 in

Wrist circumference specifications are approx. values and depend on the individual wearing habits.

Leather Strap Monza

Cases 20 mm	Type 40	Type 60	Type 31	Type 155
ideal wrist circumference in mm	185 mm	180 mm	186 mm	181 mm
ideal wrist circumference in inch	7.3 in	7.1 in	7.3 in	7.1 in
max. wrist circumference in mm	205 mm	200 mm	206 mm	201 mm
max. wrist circumference in inch	8.1 in	7.9 in	8.1 in	7.9 in
min. wrist circumference in mm	167 mm	162 mm	168 mm	163 mm
min. wrist circumference in inch	6.6 in	6.4 in	6.6 in	6.4 in

Wrist circumference specifications are approx. values and depend on the individual wearing habits.

Leather Strap Rally

Cases 20 mm	Type 40	Type 60	Type 31	Type 155
ideal wrist circumference in mm	185 mm	180 mm	186 mm	181 mm
ideal wrist circumference in inch	7.3 in	7.1 in	7.3 in	7.1 in
max. wrist circumference in mm	205 mm	200 mm	206 mm	201 mm
max. wrist circumference in inch	8.1 in	7.9 in	8.1 in	7.9 in
min. wrist circumference in mm	167 mm	162 mm	168 mm	163 mm
min. wrist circumference in inch	6.6 in	6.4 in	6.6 in	6.4 in

Wrist circumference specifications are approx. values and depend on the individual wearing habits.

Leather Strap Rotte

High-quality watch strap made of anthracite-colored wild boar leather.
Available with a pin or folding clasp.

Cases 20 mm	Type 40	Type 60	Type 31	Type 155
ideal wrist circumference in mm	183 mm	178 mm	184 mm	179 mm
ideal wrist circumference in inch	7.2 in	7.0 in	7.2 in	7.0 in
max. wrist circumference in mm	203 mm	198 mm	204 mm	199 mm
max. wrist circumference in inch	8.0 in	7.8 in	8.0 in	7.8 in
min. wrist circumference in mm	160 mm	155 mm	161 mm	156 mm
min. wrist circumference in inch	6.3 in	6.1 in	6.3 in	6.1 in

Wrist circumference specifications are approx. values and depend on the individual wearing habits.

Leather Strap Rotte XL

High-quality watch strap made of anthracite-colored wild boar leather in XL length.
Available with a pin or folding clasp.

Cases 20 mm	Type 40	Type 60	Type 31	Type 155
ideal wrist circumference in mm	192 mm	187 mm	193 mm	188 mm
ideal wrist circumference in inch	7.6 in	7.4 in	7.6 in	7.4 in
max. wrist circumference in mm	223 mm	218 mm	224 mm	219 mm
max. wrist circumference in inch	8.8 in	8.6 in	8.8 in	8.6 in
min. wrist circumference in mm	161 mm	156 mm	162 mm	157 mm
min. wrist circumference in inch	6.3 in	6.1 in	6.4 in	6.2 in

Wrist circumference specifications are approx. values and depend on the individual wearing habits.

Leather Strap Chronissimo (normal length)

Cases 20 mm	Type 40	Type 60	Type 31	Type 155
ideal wrist circumference in mm	213 mm	208 mm	214 mm	209 mm
ideal wrist circumference in inch	8.4 in	8.2 in	8.4 in	8.2 in
max. wrist circumference in mm	232 mm	227 mm	233 mm	228 mm
max. wrist circumference in inch	9.1 in	8.9 in	9.1 in	8.9 in
min. wrist circumference in mm	192 mm	187 mm	193 mm	188 mm
min. wrist circumference in inch	7.6 in	7.4 in	7.6 in	7.4 in

Wrist circumference specifications are approx. values and depend on the individual wearing habits.

Leather Strap Chronissimo (short length)

Cases 20 mm	Type 40	Type 60	Type 31	Type 155
ideal wrist circumference in mm	197 mm	192 mm	198 mm	193 mm
ideal wrist circumference in inch	7.8 in	7.6 in	7.8 in	7.6 in
max. wrist circumference in mm	216 mm	211 mm	217 mm	212 mm
max. wrist circumference in inch	8.5 in	8.3 in	8.5 in	8.3 in
min. wrist circumference in mm	174 mm	169 mm	175 mm	170 mm
min. wrist circumference in inch	6.9 in	6.7 in	6.9 in	6.7 in

Wrist circumference specifications are approx. values and depend on the individual wearing habits.

Leather Strap Antique

Leather Strap Antikleder — Pull up leather with laquered edging and colored stitch.
Available with a pin or folding clasp.

Cases 20 mm	Type 40	Type 60	Type 31	Type 155
ideal wrist circumference in mm	191 mm	186 mm	192 mm	187 mm
ideal wrist circumference in inch	7.5 in	7.3 in	7.6 in	7.4 in
max. wrist circumference in mm	210 mm	205 mm	211 mm	206 mm
max. wrist circumference in inch	8.3 in	8.1 in	8.3 in	8.1 in
min. wrist circumference in mm	170 mm	165 mm	171 mm	166 mm
min. wrist circumference in inch	6.7 in	6.5 in	6.7 in	6.5 in

Wrist circumference specifications are approx. values and depend on the individual wearing habits.

Leather Strap Vintage Brown

Cases 20 mm	Type 40	Type 60	Type 31	Type 155
ideal wrist circumference in mm	190 mm	185 mm	191 mm	186 mm
ideal wrist circumference in inch	7.5 in	7.3 in	7.5 in	7.3 in
max. wrist circumference in mm	210 mm	205 mm	211 mm	206 mm
max. wrist circumference in inch	8.3 in	8.1 in	8.3 in	8.1 in
min. wrist circumference in mm	178 mm	173 mm	179 mm	174 mm
min. wrist circumference in inch	7.0 in	6.8 in	7.0 in	6.9 in

Wrist circumference specifications are approx. values and depend on the individual wearing habits.

Rubber Strap Glatt

Black rubber strap, smooth surface,
incl. a laser engraved folding-clasp satinated or bead-blasted

Textile Strap Safety Belt

Cases 20 mm	Type 40	Type 60	Type 31	Type 155
ideal wrist circumference in mm	187.5 mm	182.5 mm	188.5 mm	183.5 mm
ideal wrist circumference in inch	7.4 in	7.2 in	7.4 in	7.2 in
max. wrist circumference in mm	208 mm	203 mm	209 mm	204 mm
max. wrist circumference in inch	8.2 in	8.0 in	8.2 in	8.0 in
min. wrist circumference in mm	167 mm	162 mm	168 mm	163 mm
min. wrist circumference in inch	6.6 in	6.4 in	6.6 in	6.4 in

Wrist circumference specifications are approx. values and depend on the individual wearing habits.

Silicone Strap S60

Cases 20 mm	Type 40	Type 60	Type 31	Type 155
ideal wrist circumference in mm	191 mm	186 mm	192 mm	187 mm
ideal wrist circumference in inch	7.5 in	7.3 in	7.6 in	7.4 in
max. wrist circumference in mm	213 mm	208 mm	214 mm	209 mm
max. wrist circumference in inch	8.4 in	8.2 in	8.4 in	8.2 in
min. wrist circumference in mm	172 mm	167 mm	173 mm	168 mm
min. wrist circumference in inch	6.8 in	6.6 in	6.8 in	6.6 in