Watch type
Watches with a built-in stopwatch. Seiko's 6139 went on sale in 1969, and most accounts call it the first automatic chronograph you could buy in a shop. We also cover the 6138 family and the 7A28 quartz chronograph.
4 references we cover.

Seiko · Vintage Chronograph
Chronographref 6139-6002
$750–$1,175 typical ask
144 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

Seiko · Speedmaster Sports 100 (Giugiaro)
Chronographref 7A28-7000
$1,475–$1,725 typical ask
10 on eBay