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.

Guinand Kalender 31

The Watch

Each of our watches claims to being something special. The Kalendar31 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

Cordovan 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

Kalender 31

Frankfurt Business Class

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

Availability
August 2020

Clasp
kalender31.1
Price:
1.690,00 
1.647,75 
1.420,48 € (VAT excl.)

incl. VAT, Info about German VAT reduction, 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 approx. 2 weeks.
Kroko straps (reptile leather) cannot be shipped outside the EU

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: 40.6 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

Black Cowhide with alligator embossing.
Available with a pin or folding clasp.

red-brown

Leather Strap Cordovan

Leather Strap Cordovan black

Black cordovan, cushioned.
Available with a pin or folding clasp.

Leather Strap Kalbsleder

Leather Strap Kalbsleder in black

Black calfskin fine grained, contrasting seam white.
Available with a pin or folding clasp.

Colour variant

Leather Strap Kalbsleder dark brown
dark brown

Leather Strap Monza

Leather Strap Monza

Dull finished calf leather with contrast stitching, BR-padded.
Available with a pin or folding clasp.

Leather Strap Monza Orange

Leather Strap Monza Orange

Dull finished calf leather with orange contrast stitching, BR-padded.
Available with a pin or folding clasp.

Leather Strap Rally

Leather Strap Rally

Soft cowhide leather with fine punching.
Available with a pin or folding clasp.

Leather Strap Outback

Leather Strap Outback

Worldwide first kangaroo nubuck leather-strap in serial production
Durable kangaroo nubuck leather strap, contrasting seam gray.
Available with a pin or folding clasp.

Leather Strap Chronissimo

Leather Strap Chronissimo

Black cowhide, integrated in the case.
Available with a pin or folding clasp.

Leather Strap Antique

Leather Strap Antique

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

Leather Strap Vintage

Leather strap Vintage

Saddle leather with light contrast stitching, at tip of strap and at lug ends.
Available with a pin or folding clasp.

Leather Strap Vintage Black

Leather strap Vintage Black

Saddle leather with black stitching, at tip of strap and at lug ends.
Available with a pin or folding clasp.

Rubber Strap Kroko

Rubber Strap Kroko

Black rubber with alligator embossing, contrasting seam white.
Available with a pin or folding clasp.

Rubber Strap Glatt

Rubber Strap Glatt

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

Textile Strap Safety Belt

Textile Strap Safety Belt

Highend textile strap with a soft inlay.
Available with a pin or folding clasp.

Silicone Strap S60

Silicone Strap S60

Black silicon strap integrated in the case with white seam.
Available with a pin or folding clasp.

Solid Strap Typ 3.1

Solid Strap Typ 3.1

Solid stainless steel sports strap

Solid Strap Typ H

Solid Strap Typ H polished

Stainless steel strap Typ H polished/satinated

Solid Strap Typ H matte

Solid Strap Typ H matte

Stainless steel strap Typ H bead blasted

Clasp Overview

Stainless steel pin clasps

Pin Clasp polished
Pin Clasp satinated
Pin Clasp bead-blasted
Pin Clasp PVD coated

Folding clasps

Folding clasp, stainless steel polished
Folding clasp, stainless steel bead-blasted
Folding Clasp Rubber Strap bead-blasted
Folding Clasp Rubber Strap satinated