This Seiko Pepsi was produced in February 1987.
These series of vintage Seiko divers can be easily recognized by the bezel that rotates in both directions (60 clicks).
Movement in this watch is original Japan made Seiko cal 6309, which is especially good because it has a big balance wheel like the best Seiko calibers starting with the number 6.
Watch is near mint condition with very minimal trace of use which are almost invisible to the naked eye, all images I take in macro mode and you can see the smallest details on them.
The crown is screwed, bezel rotate in booth sides, all stainless steel case, mineral glass. Movement working perfect also day/date function working perfect.
Very nice vintage Seiko diver.