Lings 21 Prix - Telemeter - stopwatch - Manufactured 1950-1959, Looks and works very well. Beautiful and very rare Swiss movement in its condition (but not perfect) - the two side buttons are to control the start and stop of the watch and can be used as a stopwatch. The dial has a blue telemeter on the outside and red on the inside. 9 o'clock may have a needle to record a period of time, The diameter with crown is 40 mm, the diameter without crown is 37 mm It was serviced by a professional watchmaker The strap is new, black, I am not a professional photographer and I hope the photos speak for themselves. I send the package with tracking and insurance.