Help! Identifying this center windrider tab

[cougaree]

It came from a BCE bezel I bought couple months ago. I thought it was for a BCE, but after I'd compared it with my other one, the pearl hole (on the left) looked bigger. There are only two watches I can think of sharing windrider tabs. One is BCE and the other is Blackbird. I'm pretty positive it's a gen, but from where? Any thoughts on this? Please ignore the bezel itself because I installed the tab on there.

[Navitimer]

From pictures taken out of Breitling

[cougaree]

Thanks for the reply! Well, if you compare the distance between the outer edges of the tab to the edge of the hole, the mystery tab's hole looks bigger, thus you are probably right about the tab is made for a Blackbird.