As an enthusiastic amateur I am confident with removing cleaning and replacing them. I have noticed quite a variation in pre-moon pushers. No surprise to the professionals amongst us, and forgive my naive joy in sharing what for some is the plain obvious.

This is the four types of pushers I have seen on a speedmaster. I thought it interesting to see them side by side. Two are drive in, two screw in. I think these are originals, there may be more?


And here is some of the junk(?) i removed from speedmasters that I am fairly sure they shouldn't have been fitted

 

really cool post. had no idea there were 4 or more variations.

 

whoa! that last picture resembles a yunk yard of pushers! one detail not clear to me while looking at these, is how the gasket is supposed to perform its function - it seems the gasket resides inside the "cap" portion of the pusher... ??