Primarily Petroliana Shop Talk Forums Thread Like Summary - Need Help Identifying an old 20 Gal Can

I recently got this gas can in a free pile! Yet I am having trouble Identifying it, let alone pricing it. The top is marked G.S. "Foremost" is imprinted on the side. Also on the back side, which is very hard to make out it appears to say "Superior" St. Paul then all I can make our below is 20 ____ Liquid
Sealed S 6 A

I could be wrong but it's difficult to make out.

Any information would be greatly appreciated gentlemen. Name, history etc, a value.

Confident somebody will be able to help identify this thing. Thanks all.

At least this guy gave credit to Old Gas for identifying the can, when he posted his eBay ad! John