Seiko

Collecting vintage Seiko diver watches starts with knowing how to spot factory-original condition over polished cases, relumed dials, and mismatched parts. A clean 1970s 6309-7040 “Turtle” trades between $400 and $1,200, while an original 1965 62MAS can exceed $10,000. The difference between a sound investment and a costly mistake comes down to verifying a handful…

Start with the caseback. A genuine vintage Seiko will have a crisp, engraved model reference (e.g., 7009‑3040) and a six‑digit serial number that encodes the production date. Cross‑check that serial number against a Seiko date calculator before you inspect the dial, hands, or movement. This first checkpoint is your fastest filter: if the engraving is…