FS: Sinn 256 Chronograph

38.5 Diameter 45.5mm Lug to Lug 15mm Thick 20mm Lug Spacing Caliber Valjoux 7750 Automatic Water Resistance 10Bar The Sinn 156 is a sweet and compact 7750 based chronograph that makes you wonder why there aren't (or weren't) more watches made with these dimensions at the time. This model has a friction timing bezel, its chronograph operates nicely and resets back to zero pretty much spot on. Case, crystal and bezel are very clean! The screw down crown tube engages snugly as it should but...