As Gary states, a 41. Actually first introduced in 1898, was sold for many years. Three versions are shown on page 41 of my Gas Pump Identification book, and here are some more pictures.

http://petrolianacollectibles.com/bowser%2041.htm

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