I have 5 nice working mechanisms for early mechanical Pace Slot Machines. One is a 4 reel mech and the other four are 3 reel mechs. These are a front loading mech. Can use a cleaning and oiling before use.

1 - 25 cent four reel
1 - 25 cent three reel
3 - 5 cent three reel

Last photo is what the case looks like for this type of mech.