C. Two-body, solid, polished and brushed, inclined bezel, pusher at 2 is for start/stop and return to zero functions, screweddown case back engraved with the Seamaster logo. D. Bicolor black and silver with applied steel baton indexes and luminous dots, luminous marker at 12, outer seconds/minute and 1/5th seconds divisions on a white ring, outermost black tachometer graduated to 500 UPH. Luminous white baton hands. M. Cal. 865, copper-colored, 17 jewels, straight-line lever escapement, monometallic balance, shock absorber, self-compensating flat balance spring, micrometric index regulator. Dial, case and movement signed. Dim. 41 x 47 mm. Thickness 13 mm.

Ref Variations: ST145007,