Seiko Session 'High Standard Version' made from cobalt alloy material. Ref: 8N41-7010 Quartz BMBY: September 1988 Serial: 890115 Case: 34mm Bracelet: fits up to 18.5cm All original Made in Japan Newly serviced #,SEIKO SESSION [SANTOS] HIGH STANDARD VERSION . A Seiko Session in “High Standard Version” which defines a highly accurate timepiece and top of the line. A two tone watch with the 'Santos',Vintage Seiko Session High Standard Version Santos Style Japan Watch 8N45-5000,Seiko Session High Standard Edition HEQ 5E31-5A70 Textured Dial case no.978730 , made in Japan.,Vintage Seiko Session High Standard Version 5E31 5A60 Textured Dial Men Quartz Watch Japan Square Shape 33mm - Etsy