40.50.04O
Functions
Hours, minutes, chronograph with 30 min- and 12 hours counters and central second hand, date- and day of the week display
Case
Polished stainless steel, crown flank protection, anthracite-black hard-material coated stainless steel pilot bezel features bidirectional rotation in minute increments, FKM-R sealing system
Dial and Hands
Electroplated black dial, indices coated with white luminescent color C1 (Grade X1), hands coated with white luminescent color C1, stop counter second hand in white with a tip in orange
Specific features
2 stop-subdials, no subsidiary seconds
Leather Strap Antique Leather
Brown pull up leather with laquered edging and colored stitch.
Available with a pin buckle or folding clasp.
Dimensions
| Lug width |
20 mm |
| Loading width for pin buckle or folding clasp |
18 mm |
| Strap thickness at the lug |
3 mm |
| Strap thickness at the end |
3 mm |
| Length of the buckle section (measured to the center of the spring bar) |
72 mm |
| Length of the hole section (measured to the center of the spring bar) |
114 mm |
Suitable for:
- Deepwave
- Flieger Chrono
- Series 40
- Starfighter II
- Duograph
- SFL
- Flight Engineer
- Kalender 31
- Flight Officer
- Instrument 91
- Series 60
- Werksfahrer
- Model 361
- Series 155
- Monte•Carlo
- Flying Officer
- Series 31E
- Series 41
- Series 90E
Strap length Antique Leather
Is the length of the strap sufficient for my wrist size?
ideal wrist circumference: 184 mm
/ 7.2 in
min. wrist circumference: 163 mm
/ 6.4 in
max. wrist circumference: 203 mm
/ 8.0 in
How to determine the correct strap length?
