Hi guys, The Seiko 6105-8110 was probably the one model which brought Seiko credibility as a manufacture of  'serious'  tool watches. While. Not the first (there was the Silver Wave and 62MAS before this) it was the first one to be sold in high numbers. The fact a lot of GIs bought them at the PX during the Vietnam war and took them back to the US probably helped. Oh..and a certain movie about the same war featuring this watch probably helped make this an iconic model. While I've had a