ROLEX REF. 16520 DAYTONA
COLOR CHANGE DIAL STEEL
Rolex, Oyster Perpetual, Superlative Chronometer,
Officially Certified Cosmograph Daytona, case
No. A226940, Ref. 16520. Made in 1988.
Fine self-winding, water resistant to 100 m, stainless
steel wristwatch with color change dial, round button
chronograph, registers, tachometer and a stainless steel
Rolex Oysterlock bracelet Ref. 78390.
Three-body, polished and brushed, screwed-down case
back, buttons and crown, Triplock winding-crown protected
by the crown guard, tachometer graduation on the bezel
to 400 units per hour, sapphire crystal.
Black with applied luminous white gold baton indexes,
outer 1/5th seconds track, subsidiary dials for the seconds,
the 12-hour and 30-minute registers. White gold bâton
hands.
Cal. 4030, rhodium-plated, 31 jewels, straight-line lever
escapement, monometallic balance adjusted to temperatures
and 5 positions, shock absorber, self-compensating
free-sprung Breguet balance spring, Microstella regulating
screws.