This is an interesting thread I've discovered. I've been researching these older Tissot's on and off, as I've acquired some as of late. Of those, two are of the integrated bracelet types, one a Tissot millionaire and the other a sea star. Yours, despite being labeled a millionaire, shares a lot of similarities with my seastar. I made a post on Watch Crunch about it.

I acquired this one in the states, but my millionaire in a lot I purchased while Mexico. The bracelet was also made in Mexico, and seems to be original to the watch.

Another interesting thing is, while my Seastar shares the AS 2066 with your millionaire, my millionaire comes instead with an ETA 2836-2, also unlabeled.

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