Tissot "Seastar" 37mm Automatic Stainless-Steel Day/Date Watch

An early 1980's automatic Tissot Seastar watch in superb condition, and working well.
Superbly well made, Tissot Movement 37mmx42mm case - lovely metameric blue/silver dial, with applied batons, and "T" badge.
Black Condor strap. Tissot Seastar began as a hermetically sealed waterproof watch with its name trademarked in 1952. While it is now known as a dedicated dive watch, it originally evolved from Tissot's early experiments with water-resistant models like the "Camping" (1938) and "Aquasport" (1939). 
(1950s–1970s)
Initially designed for general durability rather than professional diving, the Seastar became a versatile flagship for the brand. 
Seastar T12
 (1956): A specialized model guaranteed to 120 metres, famously used by explorer Jacques Cousteau and worn during Himalayan expeditions in the 1960s.
Seastar Seven
 (1963): Featured a patented monocoque system for a thinner, more elegant case.
Movement Innovation: During the 1970s, many automatic Seastars used the Tissot Calibre 2481, an in-house movement shared with Omega (ref. 1481).
Design Trends: The collection adapted to eras, including the "TV-screen" cases and integrated bracelets of the 1970s that later inspired the modern Tissot PRX. 
www.coronet.org +3
The Modern Dive Watch (2003–Present)
The Seastar was reimagined in the early 21st century as a high-performance tool watch for water sports. 
Seastar 660
 (2003): Relaunched the collection with a 200-metre depth rating and a broad rotating bezel.
Seastar 1000
 (2004): Named for its 1,000-foot (300m) water resistance. It became the collection's hallmark, eventually receiving modern upgrades like ceramic bezels and sapphire crystals.
Powermatic 80 Era (2018): Tissot introduced the Powermatic 80 movement, offering an 80-hour power reserve and Nivachron hairsprings for magnetic resistance.
Seastar 2000 Professional
 (2021): A professional-grade version rated to 600 metres, featuring a helium escape valve and ISO 6425 certification. 
Swatch Group +4