Rolex Air-King 34mm Silver Dial — Ref. 5500 | Key Specs Feature Details Model Name Rolex Air-King Reference Number 5500 Case Diameter 34 mm Case Material Stainless steel Dial Color Silver (sunburst/satin finish) Dial Type Simple analog dial with index hour markers Hour Markers Applied stick/baton markers Crystal Acrylic crystal Movement Rolex automatic (self-winding) Caliber Rolex Caliber 1520 (or earlier 1530 in older early examples) Power Reserve ~42 hours Bezel Smooth stainless steel bezel Bracelet Rolex Oyster bracelet (stainless steel) Clasp Type Fold-over clasp Water Resistance ~50 m (typical vintage spec) Crystal Type Acrylic (plexiglass) Gender Men’s / Unisex Production Years Late 1950s – 1989 (long running reference) Style Vintage everyday Rolex dress/sports watch