According to my Gas Pump Identification book, the 310 was made from 1930 to 1934. They were used until as long as they were still usable.

Jack Sim

Author: Gas Pump Bible, gas pump identification book. www.gaspumpbible.com

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