Rolex. A Rare Stainless Steel Wristwatch with Centre Seconds, Date and Tropical DialModel/Reference: Oyster Perpetual Date/1501Movement No: D42177, signedYear: Circa 1966Calibre: 1570, automaticDial: Tropical dial, signed Case: 34mm, stainless steel, signed Strap: Stainless steel Rolex Oyster bracelet and deployant clasp注脚勞力士，「Oyster Perpetual Date」1501型號，罕有精鋼自動上弦鏈帶腕錶，配日期顯示及變色熱帶錶盤，年份約1966。Tropical dials refer to UV exposure on the dials over a long period of time that creates a beautiful vintage look. Tropical dials are rare because these models were produced from roughly the 1950s through the 1970s, and not all dials can become tropical dials. This rare timepiece being auctioned has an evenly coloured tropical dial, this certainly adds vintage characteristics.