A very useful sailor´s start timer from this specialized brand of chronograph watches. Valjoux 7737 movement. Perfect dial and hands. Lumed seconds and bezel “arrow point”. First execution model (1972-75). 45,5mm. (Credit: regatta-yachttimers.com). Must be seen to be fully understood and appreciated. Works fine, but should be serviced if you plan to use it every day.