Raw&Mech - The 6309 vintage Seiko diver from 1977. This one is considered by collectors as probably the best vintage Seiko diver due to its overall design aesthetic, an amazingly reliable movement
SEIKO PROSPEX 1965/1970 Diver's Modern Re-interpretation | Seiko Watch Corporation
Top 5 Vintage Seiko Divers - Wristwatch Review UK
A Look at Seiko's Early Divers
What is your favorite vintage Seiko diver? | WatchCrunch
Seiko] Four of five of my vintage Seiko divers : r/Watches