1984 Seiko 'Tank' 6530-5420 Quartz – Mornington Watches,⌚️ Vintage Seiko Quartz Watch 6530-4420 Men's, Adjustable Two-Tone Band | eBay,Seiko Credor Tank (14K gold bezel) [Ref: 6730-5090] BMBY: April 1981 Movement: Quartz Case: 31mm x 25mm, only 3mm thickness Strap: comes with a brown and black snake-skin leather, 20mm lugs All,N Mint] SEIKO CREDOR 6730-5090 Gold 14K Tank quartz Men's Watch Vintage | eBay,Seiko Credor Tank (14K gold bezel) [Ref: 6730-5090] BMBY: April 1981 Movement: Quartz Case: 31mm x 25mm, only 3mm thickness Strap: comes with a brown and black snake-skin leather, 20mm lugs All