Can anyone tell me what pump company these gallon markers were made for . Solid brass and so is the rod. Rod is threaded at both ends. Had to be a 5 gallon visible. Any idea's?

Well since nobody has taken a stab at this mystery, my guess is Groetken. Nice find for sure! Good luck hunting.

Goober

Had a Groetken once i believe they were just like a 5 gal fry

Not one I’ve ever seen before. Very cool though.

This is a picture of my Groeken 57 markers, my 76 are similar. Richard

I've collected picture of indicators/markers for several years and I've never seen this one before. Wish I could help you.

Thanks Tim. I haven't either...

I'm guessing Wilco. I think I made some copies of those years ago for Miles.
Ron

Thank you , Ron.