The "Vintage Serie"
Rolex Ref. 2552

Made circa 1940. 18K yellow gold keyless pocket chronometer. Three-body case, “bassine pincée”, polished. Two-tone dial, silvered, with applied yellow gold “bâton” indexes and Arabic quarter-hour numerals, outer minute track, subsidiary seconds. Gold “épée” hands. Movement 16''', Observatory Quality “Class A Certificate 1067”, rhodium plated, polished, 17 jewels, straight line lever escapement, cut bimetallic balance, blued steel Breguet balance spring, swan-neck micrometer regulator. Diam. 45 mm.