1977 Rolex Datejust Ref. 1601 in Steel – “Silver Sigma” Dial

This Rolex Datejust reference 1601 produced in 1977 (serial number 517xxxx) features a sought-after dial: the silver “pie-pan” variant, here further displaying two "σ" symbols (the lowercase Greek letter Sigma) on either side of the "T SWISS T" marking at 6 o'clock, indicating that the markers and hands are made of white gold.
The 36 mm steel case, with its characteristic fluted bezel in white gold, houses the Rolex automatic caliber 1575, a robust, reliable, and precise movement, chronometer-certified by the COSC.
The example we have the pleasure to offer is distinguished by the superb uniform patina of the luminescent material (tritium base) of the indexes and hands – a sought-after natural evolution which gives the dial a unique depth and warmth, thanks to the contrast with the light grey of its background.
The comfortable and durable Jubilee bracelet reference 62510H with folded links and 555 end pieces harmoniously completes the watch.
This Datejust with Silver Sigma dial is preserved in superb overall condition and has undergone a complete overhaul by a watchmaker specializing in vintage calibers.

Vintage watch enthusiasts will sometimes notice the presence of the symbol "σ" (the lowercase Greek letter Sigma) on the dials of prestigious brands, such as Rolex and Patek Philippe. Introduced in the early 1970s, this symbol is used to indicate that the hour markers, and often also the hands, are made of gold. This specification was encouraged by the Association pour la Promotion Industrielle de l'Or (APRIOR) in order to promote Swiss watches in the face of international competition and to highlight the superior quality of the components used. The presence of Sigma symbols is mainly observed near the "T SWISS T" inscription at the bottom of the dial. Since not all dials equipped with precious metal decorations bear this symbol, its presence makes models marked with it particularly attractive to collectors.

This Datejust reference 1601 is preserved in superb overall condition.
The demarcations between the matte satin/brushed and glossy/mirror-polished surfaces are clear. The case retains very nice proportions. The winding crown is in very good condition. The case back is in excellent condition. The fluted white gold bezel is well defined.
The silver dial is magnificent. The luminescent material on the indexes and hands has developed a superb patina, homogeneous and warm. All the dots at the tip of the markers are present, whole and round. The date disc is original and thus presents the correct open 6s and 9s.
The Rolex Jubilee folded links bracelet in steel, reference 62510H, end links 555, clasp code DE7 (production in July 2001) is in excellent condition, with no stretch.
The movement that powers our Datejust, a self-winding mechanical Rolex caliber 1575, has recently undergone a complete overhaul by a watchmaker specializing in vintage models, and operates to the strictest tolerances.
A superb example!

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