This is exactly the one that was on german Ebay 2 weeks ago. The seller was from Gelnhausen and wrote it was an old stock from a friend who is a watchmaker!?
Am I right, the pushers are round and not moldet?
The hands looked also a bit strange to me as they where not peaked. All the Montreals I saw in my catalogs had hands with peaked tops.
I assumed it was a "put together" Montreal when I saw it, first of all I was pretty temped to buy it as well. Is the movement signed "Heuer"?
The bracelet is not the correct one for the Montreal, but it seems to be the unsigned type that has been factory mounted at the 510-Lemania Series.
You can check these bracelets under the section below: