Mentor Chronograph
Mentor Chronograph - Chronostop 711
A simple and unusual complication with 2 pushers giving a stop-start red second hand function. Large for the period being 38mm wide ex crown. A plain manual movement. The dial is well-executed and complimented by the gold hands and hour markers, blue inner and red outer tachymetre and telemetre. The chrono function is strange in that it stops the entire watch when held - not really terribly useful for any long-term use but perhaps for very short timing for medical or racing purposes it has a place.
The blue track in the centre is a tachymetric scale, the red track on the outside (note that the 10 is not exactly on the 6:00) is a telemetric scale. At sea level, sound normally takes almost exactly three seconds to travel a kilometre so that one minute is near enough 20 kilometres.
A date version has also been recorded.
Features
- Stop-Start chronograph function operating second hand. No flyback.
- Swiss made circa 1940s to mid 1950s
- Manual wind movement
- Fixed lugs 20mm
- 38mm width ex crown
- 46mm lug to lug
- Press-on case back marked Fonte Injectee
- Engraved 13 677 and 711 on back
