ROLEX. A RARE AND UNUSUAL 9K GOLD MANUAL WIND WRISTWATCH Model: Pre-Oyster Date: Circa 1920 Movement: Jewelled manual wind Dial: Silvered, black Arabic numerals, black outer minute track, subsidiary seconds at 6, blued steel cathedral hands Case: Polished round, screw down front concealing hinged inner case, fixed wire lugs, No.27823 Strap/Bracelet: Tan brown leather Buckle/Clasp: Plated buckle Signed: Case, dial & movement Size: 31mm - Weight: 29,0gr 注脚 Early water resistant watches were fully encapsulated in an outer case. This example of a Pre-Oyster Rolex case has a screw down glazed front with the case and winding crown inside. Effective though it is, you had to open the case to wind it every day. However it gave the watch the unusual perfectly round look with no winder protruding to spoil the silhouette.