Actually, your watch piqued my own curiosity, so here is a smattering of info to get you started; hope it helps. This appears to be a time only (chronographs were made) 'sei tacche'. These also utilized calibres 12.68z and 27M, from what little I've read. The Longines extract will likely provide greater details. These were commonly seen as daily wear tool watches of the time, i.e., for practical use and utility, and an older dial refinishing like this seems to be is not terribly uncommon, although it does impede collectibility for most hobbyists. In some cases, I personally find a decently done refinish an 'ok' thing, as it shows that at some point someone was attached enough to the watch to want to keep
that particular piece as their watch, and not just junk it like so many people do nowadays with iPhones and the like. Especially with a proper servicing, always a good idea for a vintage piece prior to wear, this one should keep time steadily and accurately for many more years to come. Provided, of course, you remember to wind it.
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