THE GOLDEN AGE OF SWISS FINE WATCHES: ROLEX 6556 TRU-BEAT - Montres Publiques - The vintage watch magazine
The Restoration Of A Rolex Tru-Beat Caliber 1040 (Reference 6556) - Hodinkee
Ref. 6556 "Tru-Beat, Black Dial" Rolex, 'Oyster Perpetual, Tru-Beat, Superlative Chronometer Officially Certified', Ref. 6556. Made in 1961. Very fine and very rare, center-seconds, self-winding, waterresistant, stainless steel gentleman's wristwatch ...
Rolex Tru-Beat 6556 - YouTube
Rolex Tru-Beat
Rolex Tru-Beat Watches | ref 6556 | Rare 'Jumping dead-seconds' | The Watch Club