Rolex Tru Beat reference 6556 Oyster Perpetual 34mm steel watch
Rolex - Rolex Milestones: 38 Legen... Lot 815 November 2016 | Phillips
1956 Rolex Tru-Beat 6556 All Original Cal. 1040 - Lunar Oyster - Buying and Selling
Cool Rolex of the Day #2037: 6556 Tru-Beat with "Service Watch" written on the dial and "Property of Rolex Watch Division Tokyo" on the caseback, steel, 34mm. Circa 1958 : r/rolex