Hey Tom - thanks for the information......I was kind of hoping it had a chrome silver headlight frame and silver accents on the hose-port cover....I think that Eureka added gold features to the Automatic upright and Roto-Matic canister in 1957 for the golden 50th anniversary of the company (Eureka started in 1907 in Detroit).
But I always thought that the model numbers somehow matched the year the particular vac was put on the market (Upright 260 = 1960, Upright 2070 = 1970, Upright 2072 = 1972, etc.) So I'm still not sure which model number we had on a silver-trimmed "Automatic" upright (I no longer have the vac....*sniffle, sniffle, boo-hoo*) Unless your 260 originally had silver accents and the headlight frame and hose port cover was replaced at some point.
I can't tell from the picture - is your 260 a turquoise/aqua blue colour, or green colour? Ours was definitely blue - I think the golden anniversary edition was more greenish in tone....