Apologies for the delay, it has taken some time to track down information on this dinosaur!!.
The numbers in photo’s would indicate it is a Model CR140S fitted with Ford Engine Late 70s Looking at main photo it has obviously been modified in its lifetime.
As Model Number suggests it is 140 CFM @ 100 PSI.
problem is the guy looking it up probaly dosent have ready accses to any more info tend to find anything made pre everything being on computer can be a challenge to get detailed info on, sometimes i've been lucky enough to get emailed a scan of tech specs or relivant part of manual but not often.
as for ingersol rand compressors ones ive used have been good, mines older and smaller tho a pw130 but i do do a littel bit of hobby blasting and it copes with that happily but other than that i use it for workshop air when all the toys are out