With that base, it would not have been mounted to a tank. This is a commercial pump, used anywhere it was not necessary to compute the number of gallons or the price.

Some might call this a a pre-visible, but companies were still making these in the 1960s.

Jack Sim

Author, 1st & 2nd editions of Gas Pump ID book, 3rd edition is now available at www.gaspumpbible.com
Air Meter ID book also available