Introducing this exquisite 1970s Tissot Seastar T.12 (T12) reference 40506 chronograph. This watch features an oversized 42mm diameter case, its original Gay Frères bracelet, and original dial and hands. The dial and hands and chapter ring have been delicately cleaned and are in spectacular original condition. The striking orange highlights on the hands and chapter ring add a touch of sportiness to this stunning piece.

With an oversized 42mm diameter case, this Tissot Seastar T.12 is an oversized watch, even by modern standards. The intricate details such as the stylish chunky hour markers and the ship engraving on the caseback create a sense of nostalgia and charm, making it a must-have. The watch is fitted with the highly regarded triple-register Tissot Lemania 1281 chronograph movement–the movement that served as the base movement for the iconic Omega Speedmaster 861. The chronograph features a 60 second register, a 30 minute register, and a 12 hour register. The Lemania 1281 is renowned for its precision and reliability, and has been fully overhauled and restored to ensure optimal performance.

The watch case and original Tissot Gay Frères bracelet are fully restored to OEM finishings and gleam with a lustrous finish. The dial features its original tritium lume. The dial, case, bracelet, crown, movement are all signed Tissot. Possibly the nicest example of this rare Tissot reference available for purchase and fully backed by EmmyWatch’s zero headache warranty. Experience the legacy of high-end Tissot with this coveted chronograph – a true collector’s dream!







Watch Diameter



Tissot Lemania 1281


Hand Wind




Acrylic Diver


Original Dial

Recommended Wrist Size

6.5 to 8"

Shock Resistant


Strap Size


Strap Type

Tissot Gay Frères Original Bracelet

Water Resistance

~5 atm

1970s Tissot Seastar T.12 4050...


Watch In Stock