Rolex - 1971 ref. 1601 Silver “No Lume” Datejust
It doesn’t get much cleaner than this. This is a Non Luminous dial Datejust w/ matching non lume hands. If you were at CERN, this might be the watch for you.
Case: 36mm Stainless Steel, Excellent Condition, Appears Near Unpolished
Bezel: Fluted White Gold
Dial: Brushed Silver
Bracelet: 6251H, Stainless Steel Oyster