Seiko

The line of watches and the movement is not widely known outside vintage Seiko enthusiasts, but is a significant piece in Seiko's history. The watch houses a famous calibre of theirs - the 6810 ultra thin which has been one of their longest produced calibres in their history. The 68xx movement was first introduced in 1969 (at the same time as the Astron) and while it had a brief break during the quartz era, was brought back in the 90s and 2000s when Seiko decided to focus on mechanical watches again.

What makes this watch special is the thickness of the movement - 1.98mm! At the time, Seiko made this to complete with Piaget's ultra thin, and although debatable, many believe Seiko beat them. I took a photo of the watch with an Australian 20 cent coin for reference.

Thanks!