Most Banners didn't last 6 months outside, IMO the photo is Early 1932.
Yes, 76 was the Octane at the time.

Anyone ever notice that the price of a qt of Oil was almost unchanged from the 30's till the oil embargo of the late 70's & Gasoline was all over the board?

Reproduction/Fantasy Cans
http://i124.photobucket.com/albums/p2/oldegaspump/AllCansMASTERTHUMBNAIL_zps4bfdbbc7.jpg
Rnd Can Re-lids