Split-second Timer, 1/10 seconds with side push-piece,
start, stop and return to zero by pressing the crown. Pressing the side push-piece stops one of the hands so that a reading can be made, a second pressure again on the push-piece makes the stopped hand catch up the moving one. 2 revolutions per minute, small register up to 15 minutes. To make reading easy, the outside figures from 1 to 30 are black and the inside figures from 31 to 60 are red: read figures of the colour shown by the small hand of the register.
The movement used is a Valjoux 330, face picture courtesy of Manfred Zwehn