I'm looking for a little assistance in identifying this Heuer crown. It was picked up with a lot I had to purchase to get the Favre Leuba crown I needed. I'm inventorying the remaining bits of the lot and wasn't sure if this one is even an legitimate Heuer part as I cannot find any Heuer that had a six sided crown. The crown is smallish- 4.60mm measured across from the flat of one side to the other, 5.15mm from point across to point, and is a tap 10 stem size.

Any insight is appreciated. My apologies for this being my first post but I haven't really had a chance to get into the world of Heuer as I'm just getting my feet wet with vintage Breitlings. I figure if anyone knows the answer it will be an OnTheDash member.