Vibco
Vibco Usl-1600 Electric Vibrator, 5.00 A, 115Vac, 1 Phase
What stands out about this is the branded logo, which is molded into the plastic.
Vibco Scr-100 Series Commercial Electric Speed/Force Vibrator 1.3A 115VAC 1PH
You will find that Super Lube is gentle on O-rings and won't cause them to swell.
Vibco BV-250 Ball Type Pneumatic Vibrator, 380 LB, 11000 VPM, 80 PSI Max, New
The Milwaukee branding on this tool tells you it was built for real work.