Rolex, Rare Modified Ref. 6556 Tru-Beat Precision, Stainless Steel, Automatic, Circa 1961 . ...

Condition Report*: Type: Rolex, Rare Modified Ref. 6556 Tru-Beat Precision, Stainless Steel, Automatic, Circa 1961
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.