Thought this might be of interest. I posted a vintage Heuer on the forum about a week ago that I bought while on vacation in Argentina because I had some question about its authenticity. I mean I knew I was rolling the die but the price was right. Though I had never seen a Heuer with its markings it looked right to me, as much as I could tell the dial didn't look refinished and the case matched the dial. It needs some repair work, bought I got confirmation that it isn't a FrankenHeuer. The dial hasn't been refinished, and the parts were original - though slightly rusted.

I don't know what it is still and may try to see if Tag will help, though I doubt it. Argentina does have a large European influence from Germany and Italy - maybe it is possible that the 17 rubis dial was some small production run?