Details
A STEEL WRIST CHRONOGRAPH
ROLEX OYSTER COSMOGRAPH
The 17-jewel two-button chrongraph movement with silvered dial,raised abstract chapters and hands, black 12-hour and 30-minute registers, black subsidiary seconds, steel bezel calibrated with tachymeter scale, within a steel screwback case, model 6239, no. 1090402, with oyster crown, signed on case, dial, and movement, 1960s
ROLEX OYSTER COSMOGRAPH
The 17-jewel two-button chrongraph movement with silvered dial,raised abstract chapters and hands, black 12-hour and 30-minute registers, black subsidiary seconds, steel bezel calibrated with tachymeter scale, within a steel screwback case, model 6239, no. 1090402, with oyster crown, signed on case, dial, and movement, 1960s