Movement & technical notes
- Top pusher (at 2 o’clock): Start / Stop
- Bottom pusher (at 4 o’clock): Reset
How to use the Tachymeter scale (speed measurement)
The tachymeter scale is used to calculate speed over a known distance (usually 1 km or 1 mile).
Example (speed measurement)
- Start the chronograph as the object passes the starting point.
- Stop it after it travels 1 km (or 1 mile).
- Read the number on the tachymeter scale where the central chronograph seconds hand stops.
That number is the approximate speed in km/h (or mph if measured over 1 mile).
Quick example: If 1 km is covered in 30 seconds, the hand points to 120 on the tachymeter scale = 120 km/h.
How to use the Telemeter scale (distance measurement)
The telemeter scale is used to estimate distance based on the speed of sound – traditionally for visible/sound events (e.g. lightning/explosion and thunder).
Example (distance measurement)
- Start the chronograph when you see the event (for example, lightning).
- Stop it when you hear the sound (thunder).
- Read the value on the telemeter scale where the chronograph seconds hand stops.
This gives the approximate distance to the event (in kilometers on this dial chapter).
Quick example: See lightning → start timing; Hear thunder a few seconds later → stop timing.
Important Notes
- Dustproof only
- No water resistance warranty is provided
Dimensions
- Width (without crown): 36 mm
- Width (with crown): 38 mm
- Lug-to-lug: 45.6 mm
- Thickness: 11.9 mm
- Lug width: 18 mm
