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Rolex, Rare Modified Ref. 6556 Tru-Beat Precision, Stainless Steel, Automatic, Circa 1961 . ...
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Description
Rolex, Rare Modified Ref. 6556 Tru-Beat Precision, Stainless Steel, Automatic, Circa 1961Case: 34 mm, stainless steel, three body, with screw-down crown and bezel, stamped II.61, No. 731877
Dial: sunburst silver, with outer minute track, and applied raised and segmented stainless baton markers; stainless sword hour/minute hands, with early Tru-Beat arrow-tipped sword sweep seconds hand
Movement: Rolex caliber 1040 automatic, 26 jewels, Swiss lever, adjusted to five positions plus temperature, with "butterfly" rotor and rhodium finish, converted to standard sweeping center seconds, No. N919788
Band: none
Signed: Rolex on dial, case, crown, and movement
Named for its quartz-like, once-per-second tick, Rolex's Tru-Beat was marketed to medical professionals, and promised to make reading a patient's pulse easier. Few were produced. This is among the rare Precision versions that do not include "Tru-Beat" on the dial, and, typically, was at some point converted to conventional sweeping seconds.
Signed: Rolex on dial, case, crown, and movement
Model: Tru-Beat Precision, Ref. 6556
Dial: sunburst silver, with outer minute track, and applied raised and segmented stainless baton markers
Hands: stainless sword hour/minute hands, with early Tru-Beat arrow-tipped sword sweep seconds hand
Metal: stainless steel
Case: #731877
Case Info: three body, with screw-down crown and bezel, stamped II.61
Case Width: 34 mm
Crystal: acrylic
Watch Movement: Rolex caliber 1040 automatic, 26 jewels, Swiss lever, adjusted to five positions plus temperature, with "butterfly" rotor and rhodium finish, converted to standard sweeping center seconds, No. N919788
Band: none
Circa: 1961
Condition: Very good, unblemished dial. Good case, polished, with functioning screw-down crown, undamaged case-back knurling, and signs of daily wear. Note that reference number between lugs shows second "6" to be factory-stamped over "8." Running, but service is recommended.
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