I have two older Plomb ratchets on my desk this morning. They are both what I would call pear-head rats, and - not being a Plomb expert - I never realized the different styles. (It's like with the Craftsman ratchets - until you put them side-by-side they all kinda look the same). Since this is the first time I've had two such old Plombs at one time, I figured we should pull'em apart and take a look at them guts!
The one on the left is a 4749 1/4", the one on the right is a WF-8 9/32" drive. The little screws on both are 2-56, though one uses a pair of flathead philips and the other a single round head phillips. Both have 24 tooth gears, but the end bushings are different, so, no interchanging is possible. The pawls on both are tic-tocs, but very different, so, those are not switchable either.