OMEGA FIRST-GENERATION SECOND
VERSION PRE-MOON & PRE-PROFESSIONAL
SPEEDMASTER CHOCOLATE DIAL STEEL
Omega, "Speedmaster", movement No. 19584900, Ref. 2998-4. Made in 1962.
Very fine and very rare, water-resistant, stainless steel
wristwatch with black to brown color-change dial, round
button chronograph, 12-hour and 30-minute registers
and tachometer bezel.
Three-body, polished and brushed, color-change
black to gray bezel with tachometer scale to 500 UPH,
concave lugs, screw-down case back with Speedmaster
logo, dust cap.
Brown with luminous baton indexes, outer minute/
seconds divisions, outermost 1/5th second divisions,
subsidiary dials for the seconds, the 12-hour and
30-minute registers. Luminous steel alpha hands.
Cal. 321, copper-colored, 17 jewels, straight-line
lever escapement, monometallic balance, shock absorber,
self-compensating Breguet balance spring, index