Hi NormK, is that the one you operate with two hands and has a criss cross expanding section? I have a simple hand riveter I use only for smaller aluminium rivets as it hurts the knuckles to use on tougher rivets.
My air one needs an oiling and greasing of the bore. It's taking two pulls of the trigger to complete the job.

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!