Help with identifying a chronograph movement

[ExtraExtra]

So finally got curious enough and opened the case back of the Breitling Flying B chrono. It has 8 screws total with the corners screws having a bit taller heads. Here's are pics and would appreciate if someone can help identify the movement. I could not see or locate any markings and does not look like a 7750.

 

[PLNY]

So finally got curious enough and opened the case back of the Breitling Flying B chrono. It has 8 screws total with the corners screws having a bit taller heads. Here's are pics and would appreciate if someone can help identify the movement. I could not see or locate any markings and does not look like a 7750.

Breitling 44B based on ETA 2892.

 

[ExtraExtra]

Breitling 44B based on ETA 2892.

Thank you. I see it now.