Era
Seiko's great decade of mechanical tool watches. The asymmetric 6105-8110 diver, the first 6309 Turtles from 1976 and the 6138 automatic chronographs sit here, along with the 7548 quartz diver from 1978.
5 references we cover.

Seiko · Vintage Diver
Diveref 6309-7040
$675–$975 typical ask
44 on eBay

Seiko · Vintage Diver
Diveref 6105-8110
$2,200–$2,725 typical ask
69 on eBay

Seiko · Vintage Diver
Diveref 7548-700B
$430–$625 typical ask
18 on eBay

Seiko · Vintage Chronograph
Chronographref 6138-0040
$800–$1,425 typical ask
77 on eBay

Seiko · Vintage Chronograph
Chronographref 6138-8039 (US market)
$925–$1,200 typical ask
17 on eBay