Dial, case and movement signed. DIM. 47 x 47 mm. THICKNESS 15 mm. This particular watch belongs to the last and smallest of the seven groups of Ref. 3646 watches (named Type A to Type G) . The only 7 known watches of this number group (G Type) are numbered between 317488 and 317526. This watch has the highest case number (317526) and represents "the last 3646" made in 1944. Typical features of 3646 / Type G watches are: the missing Rolex SA embossing on the center of the inner caseback and the case number placed in the upper area. The Rolex SA logo has been milled off, in our understanding to hide the origin of this military tool watch. Another feature of 3646 / Type G watches is the center bridge of the movement which bears the "17 RUBIS FAB. SUISSE", while earlier 3646 watches have the "ROLEX 17 RUBIS" engraved at the left side of the bridge. All known watches of this number group are equipped with a flat bezel as the dial are "California Dial" or the painted brass dial (not the typical sandwich construction from Panerai, which needs a higher bezel because of the HEIGHT of the dial itself). This particular dial, a black painted brass disc with luminous material applied from the top, can be easily identified from a distance by its "closed" numbers 6 and 9, while on Panerai sandwich dials these two numbers are "open" because of the different production process. We would particularly like thank Volker Wiegmann & Ralf Ehlers for their valuable assistance in researching this rare watch.