Orchi believes these are Rolex Ref 16750 GMT Master Dial Variants..+pics. - Rolex Forums - Rolex Watch Forum
Rolex GMT-Master Matte Dial 16750 (SOLD) - The Vintage Concept
Authentic Used Rolex GMT-Master 16750 Watch (10-10-ROL-GKQCDT)
Authentic Used Rolex GMT-Master Pepsi 16750 Watch (10-10-ROL-T0CR2H)
Sold at Auction: ROLEX, ROLEX, Oyster Perpetual, GMT-Master “Pepsi”, Ref. 16750, movement no. 07343011, case no. 6273943, sold in 1981 and retailed by Bucherer.
Rolex 16750 GMT-Master Ultimate Buying Guide
Rolex GMT-Master Men's Black Watch - 16750 for sale online | eBay