Primarily Petroliana Shop Talk Forums Shop Talk Petroliana Forums Petroliana Value Questions Southwest Pump model "90R"

Hi,
I'm a new member from Washington state. I've been collecting old things for most of my life. Vintage motorcycles, Kawasaki snowmobiles, old tractors, you get the idea. In the late 70's I purchased an old gas pump to pump gas from my underground tank. I used it for many years then retired it. I recently decided to try my hand at restoring it. Not knowing what I'm doing I thought it best to join here for advice.
The pump:
Manufactured by the "Southwest Pump Company" in Bonham, Texas.
Model # "90R".
It has a UL number of "668982"
The original gas company logo's were painted over but I can read "Rainbow", "Certified" and "??ETRA??"
Looking for any info about the pump and Rainbow Gas.
This pump is heavy. Two men couldn't pick it up.
Everything is there and it works.
Any idea where I can find out about the pump or locate decals would be appreciated. Also, any thoughts about value?