263: Officine Panerai, Ref. Op 6541.Steel
Officine Panerai, Firenze 1860, "Luminor Submersible 1000 m. - Diver's Professional", Automatic, No. C 306/500, Ref. OP 6541. Made in a limited edition of 500 pieces in 2000. Fine and rare, large, cushion-shaped, self-winding, water-resistant, stainless steel military diver's wristwatch with date, helium escape valve and a stainless steel Panerai buckle. Accompanied by a fitted box and certificate. C. Three-body, polished and brushed, screwed-down engraved case back, graduated unidirectional revolving bezel, patented winding crown with security lever, helium escape valve on the band at 9, sapphire crystal with "cyclops" lens. D. Black with luminous Arabic numerals and indexes, subsidiary seconds dial at 9, aperture for the date. Luminous steel "skeleton" hands. M. Cal. OP III (base 7750 P1), rhodium-plated, "oeil-de-perdrix" and special "Panerai" decoration, 21 jewels, straight-line lever escapement, monometallic balance, shock absorber, selfcompensating flat balance spring, micrometer regulator. Dial, case and movement signed. Dim. 44 x 44 mm. Thickness 18 mm.
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