Hi G
When I saw this watch for sale i knew i wanted to get it. I thought it would be my last watch for the year.....
This example is about two years newer then yours....




Then i took a closer look at the caseback..
and a closeup..
Well what I originally thought was a fuzz or a hair turns out to be a crack in the caseback !
i contacted the seller and no problem the watch was heading back to him.
So the last watch of the year for me was not the seiko that I thought it was going to be.
Good Hunting
Bill