SEIKO Automatic Chronograph "Helmet"
Caliber 6139-7100 Seventeen jewels
The problem with collecting vintage Seiko automatic chronographs is that you always have to "buy one, sell it once you spotted another better one"!
I once had a 6139 Helmet but sold to raise some funds for another purchase then. Recently, I chanced upon another excellent condition piece belonging to a local collector and bought it in a flash. Now I had better rest my guns on the 6139 (after scoring this and the Pongue) and re-focus back to my 6138s.