Looking at all the Revere catalogs I have had, Revere never set out to make a "Air, Water pole." They just offered this as an option to any light pole they made. This is why there are so many different ones.
I put a few in my Air Meter Identification book, but there was no end to them. They were just poles drilled out to accommodate a air line or a water line.
Jack Sim
Author, 1st & 2nd editions of Gas Pump ID book, 3rd edition is now available at
www.gaspumpbible.comAir Meter ID book also available