This is a vintage 1970s Tissot Seastar Automatic Day-Date wristwatch housed in a stainless steel C-shaped case.

- Dial & Features: It has a patinated champagne-colored dial with a day and date display at the 3 o'clock position.

- Movement: These models from the early 1970s are typically powered by a Swiss 21-jewel automatic movement, such as the Tissot Calibre 2571.

- Condition: The dial shows natural aging and spotting, which is common in vintage timepieces from this era.