What a great and minty example this is! A very rare large Longines tank watch called Medicus (cause of the dial layout). It's truly stunning with pink/salmon dial with silver seconds track and beautiful blued hands. The large mint steel unpolished case measures 22x36,5mm and bears ref 3640. It comes with extract and was delivered to France in 1941 (fab Suisse dial). Movement is Cal. 25.17 and is in perfect working condition. Attached is a period style stretch bracelet but it can also be worn on a nice leather strap. Really classy Longines.