Very similar to it’s bigger brother, the Omega Seamaster from the same time, this all steel Tissot shares most of the same qualities. Tissot was the cheaper alternative to Omega from the company owning both brands. These watch brands were therefore very often sold by the same watchmaker.
The signed and numbered caliber 784 automatic movement with 21 jewels has # 6174137. The model reference is stamped inside the back cover is 43502 and 44502 2. Dating it to ca 1963. Diameter 34,5mm.
This watch has an engraving on the back (name only).