I have a couple of 3925522 pulleys. One has an AQ suffix while the other does not. The one with the suffix is also stamped deeper. Anyone know which is original, or are both? The reproduction ones appear to come without the AQ and appear to have the shallower stamping. Any input would be appreciated. Other than the stamping, I can see no discernable difference.
This is one I believe to be original, with the AQ.
smog pump pulley AQ is what Joe sold me (2).jpg
This one lacks the AQ. Original?
smog pump pulley AQ is what Joe sold me (8).jpg
This is one I believe to be original, with the AQ.
smog pump pulley AQ is what Joe sold me (2).jpg
This one lacks the AQ. Original?
smog pump pulley AQ is what Joe sold me (8).jpg