Seiko tank 2628-5120,Seiko tank 2628-5120,Seiko Quartz 2628-5070 Tank Sub-Second Two Tone White Dial,Vintage #Seiko Tank 'Sub-Seconds' [Ref: 2628-5019] Quartz BMBY: March 1982 Serial: 230843 Case: 21mm x 38mm (men's) Strap: original Seiko strap and buckle Crown: onyx All original Made in Japan Newly serviced,Seiko tank 2628-5120