Posts 499 Likes 248 aleksejeremeev ·Mar 1, 2023 Vintage longines, definition of reference. Unusual case, never seen anything like it before. Probably a very rare model. Movement 2517.
Posts 2,820 Likes 4,923 DirtyDozen12 ·Mar 1, 2023 That is a really cool-looking case, which I have not seen before. Do you have photos of the movement and inside of the case-back?
Posts 499 Likes 248 aleksejeremeev ·Mar 1, 2023 Looked at a lot of directories? But never came across such a case.
Posts 2,820 Likes 4,923 DirtyDozen12 ·Mar 1, 2023 Thanks for these additional photos. Seems to be from circa 1936. I imagine that Longines could tell you the reference number if you are interested.