HEUER REF. 110.313 SILVERSTONE STEEL
Heuer, "Silverstone, Automatic Chronograph", case No.
308070, Ref. 110.313 F. Made in 1972.
Fine, cushion-shaped, water-resistant, antimagnetic,
stainless steel wristwatch, round button chronograph,
registers, date, crown at 9 o'clock, with a stainless steel
Heuer/NSA bracelet.
Two-body, polished and brushed, concave bezel,
hooded lugs, screwed down case back, sapphire crystal.
"Smoke" with luminous baton indexes, subsidiary
dials for the 30 minute and the 12 hour registers, outer
minute and 1/5th second divisions, aperture for the date.
Luminous white baton hands.
Cal. 12, gilt brass, 17 jewels, straight-line lever
escapement, monometallic balance, shock-absorber,
self-compensating flat balance spring, index regulator.