Posts 11 Likes 14 FormerCollector ·Jul 1, 2023 Is this common for a Tissot Sideral? Or was it marked by the prior owner (my grandfather)? I’d ask him but, well….
Posts 31 Likes 103 Marbleu ·Jul 2, 2023 It might be a watchmakers service date eg May 1st 1974? Looks hand engraved.
Posts 18,206 Likes 27,544 Foo2rama ·Jul 2, 2023·Nowhere near as grumpy as he used to be... Not factory and I don’t think a watxh maker would mark externally. although that is not a metal case so maybe it is a watrchmakers mark.