Rick,
I posted a scan of the air pump on the page below. I don't know if this will show the details needed but I have a few more at different angles. I have a couple of things I can send back channel.
I can't make out all of the plate but here is what I can read.
line 1 WESTINGHOUSE
line 2 AIR BRAKE CO
line 3 No clue
line 4 WILMERDING PA USA
line 5 Probably model and serial number
The rest I don't know
Dave Dye