Air Compressors ?

[sido]

greeting
I recovered an old compressor, except the inscription "MADE IN UNITED STATES AMERICA" and a N° 49712 and K 18-37....An idea
Thank you .

 

[The Cobbler]

looks like a refrigeration compressor

 

[mike93lx]

looks like a refrigeration compressor

With an intake and filter?

 

[The Cobbler]

With an intake and filter?

good catch... possible it was added? I still think it looks refrigeration