Well I'm not one of the people you asked for help from but I've been slinging pumps for 25+ years and I've never seen it. Almost reminds me of a Groetken in its simplicity and industrial look but I don't believe it is. I'm stumped. I'm betting most everyone else is as well (if not everyone). I'd sure love to be standing there looking at it so I could give it a proper review. Wonder if it was something homemade or semi-homemade...those cylinder rods look very thin and the access plates (if there were any) don't seem to have any way to secure...are there screw holes we just can't see in the pics?
