Vintage DeVilbiss Cast Iron Air Compressor Pump with GE Motor. Has a small tank between the pump and motor with a drain valve at base and carrying handle on top. Another fitting on top which may be a relief valve.
Runs great and sounds good. I have a video of it running with a gauge and valve on it. Closing valve it pumps right up to 80-90 psi but then I open valve as I don't know how high of pressure it is rated for. I can text video to you of it running.
Measures 17" x 10-3/4" x 15" high