Pre-owned Ladies Rolex Oyster Perpetual ref 177200 (2016) has a somewhat unusual blue dial by Rolex’s standards. While we’re used to seeing blue watch faces from the crown, they typically have applied indices. On this model, the Roman numerals are presented in light blue, punctuated by silvered Roman numerals at the cardinal markers and white minute hashes. The watch is cased in stainless steel and features a very approachable 31mm mid-size lady’s Oyster case. As with every OP watch, the case is rated waterproof up to 100 meters and houses a reliable self-winding mechanical movement with time-only functionality. Shop Rolex Oyster Perpetual 31 Collection