This is a very rare early reference Longines 3810 which measures 37mm excl. crown. It's in great all original condition with lovely aged Breguet style dial and blued hands. The Calatrava style case is unpolished and has a beautiful coin edge bezel. Movement is the large Caliber 15.94 which is running nicely. It was delivered in 1936 to Zipper Poland and comes with the Longines extract. Attached is a period style nubuck strap. It's quite difficult to photograph the lovely original condition but it's really nice on the wrist and finding one in untouched condition is a challenge... Offered at a great price for this ref!