Hey! This site is reader-supported and we earn commissions if you purchase products from retailers after clicking on a link from our site.

by Evan W.
(Spokane)

It is 2 stage / 4 cylinder; no obvious patent number visible, a hand stamped number ” A 16434 “.

It has barely legible casting numbers that kind of look like ” 433 – 158 “; and a casting logo that barely legible says “United Stated of America” … that’s it.

Who mfg. this pump?

Will appreciate your wisdom. Thank you.

Evan

sr.engineer at techemail dot com

__________________

Bill

Evan, images went missing in the site transfer. If you get the chance, would you please provide them again in a comment below?