Up for sale is a rare vintage Seiko B137-4020 men’s digital sports watch from the late 1970s. This Japan Domestic Market (JDM) model represents one of Seiko’s most innovative early digital designs from the pioneering era of quartz technology.

The watch is fitted on an aftermarket stainless steel strap and is in good physical condition, showing signs of use consistent with age. The display has an issue where it appears to function normally in standard time mode, but when switching to other modes such as the chronograph or alarm, some of the digits or pixels are missing.

A standout element of this model is its unique crown-based control system — pulling out the crown allows the user to digitally set the time and cycle through modes. This ingenious and highly unusual system remains one of Seiko’s most distinctive early digital innovations.

Key Details:

• Brand: Seiko

• Model: B137-4020

• Movement: Digital (Module B137)

• Era: Late 1970s (Vintage JDM release)

• Features: Timekeeping, crown-based digital setting and mode cycling

• Strap: Aftermarket stainless steel bracelet

• Condition: Good overall physical condition with signs of use

A historically significant Seiko digital watch showcasing the brand’s experimental ingenuity from the quartz revolution era. Despite its display issue, it remains a desirable and collectible piece for enthusiasts of vintage Seiko design.

Ships carefully and securely.

Feel free to message me with any questions.