Seiko Bullhead Chronograph circa 1977
The 21 jewel Seiko 6138A was first released in 1969, and was the first fully integrated two-register automatic chronograph with a column wheel and vertical clutch and 21600 bph. I purchased this last Christmas Eve “Eve” 12-23-23 while browsing...
Agree!
It’s got a lot “under the hood” very historical horological movement for sure.
