Jason--I couldn't find it in the pump ID book but if you'll post a picture, I'm sure someone will have information for you. If you don't know how to post pictures, send it to me and I'll post it here for you. send to: kwfrith@gondtc.com
I just read your header again--C-81 or C-31?????
The 81 was a 1926, ten gallon, square bodied visible. It is located on page97 of Jack Sims pump Identification book. (second edition) If you don't have this book, I'd recommend getting one, as every pump ever made that is known to man, is listed.---
Last edited by K W FRITH; Wed Dec 07 2011 09:41 AM.