A "Sigma" dial is denoted by the demarcation of "T swiss T" by two small "σ" symbols. The sigma symbols indicate that baton hour markers and hands are made of white gold - in this example white gold. Back in the early days Italian collectors use to call Sigma dials "goute à prior" which translates to "a drop prior to." ABOUT THIS WATCH: MANUFACTURER: Rolex MODEL: Datejust REFERENCE: 1601 YEAR: 1975 SERIAL: 390XXXX CASE: The steel 36mm case is looking nice and clean for its age. It has seen a polish in the past yet retains strong and full lugs. There is minimal wear as evidenced by photographs. The case is completed by a white gold fluted bezel which is in great shape. DIAL: The silver sunburst pie pan sigma dial is in great condition free from any patina or blemishes. The dial features white gold baton style hour indices and baton hands. The lume on the dial aged to charming vintage cream beige while the hands have aged just one shade lighter. The sigma dial is correct for a 70s 1601. MOVEMENT: Rolex automatic caliber 1575. Service history is unknown. The watch winds, sets. Runs and is keeping good time. BRACELET: Comes in the corrected folded link jubilee bracelet. Minimal stretch as noted in photograph. Complete with the correct 6251 H clasp. ACCESSORIES: None BOX/PAPERS: No. WARRANTY: None. BANK WIRE PRICE: $3,900 shipped. Zelle works too. Additional forms of payment available through our website like PayPal, Credit Card and payment plans at additional cost due to fees. [Website](https://steelcitywatches.com) [Instagram - Inventory Lands Here First!](https://www.instagram.com/steelcityvintagewatches/)