I bought a 105.012 where the chrono reset pusher appears to be original but the chrono start/stop pusher was replaced by the seller. However, I am not able to identify which Speedmaster reference this belongs to (if it even belongs to a Speedmaster).

It seems shorter than the later 145.012/145.022 reference pushers but just slightly taller than the 105.012 pusher (the top of the pusher is also flatter compared to the rounded 105.012 pusher). Anyone?

 

Anyone knows? If not, I will probably just go ahead and replace it with a service 105.012 pusher.

 

Research tall vs short pushers.