Today a very rare regatta chronograph: A Le Phare regatta chronograph with Valjoux 237 disk and flyback function. The 5-minutes countdown wheel is turning every 10 seconds. I asked ETA Valjoux, if they can tell me the total amount of production of this movement, because a few years ago, there was a pdf., where 300 units of this movement were stated. If that is correct, it would be by far the rarest ETA chronograph serial movement. ETA replied (thanks for that!!) and told me, that they have no records of the pruduced movements, but that it is rare.