I have been expanding the Gilbarco part of my website to include many parts that I have been able to come by lately. While I can't give a specific value on your air mete until I see a picture of it, you might find it interesting to look at the website. Please, either send me a picture, or post one here. http://crspub.com/tireflator/other%20tireflator%20parts.htm
I am still working on this part of the website, and will be posting pictures of all the Gilbarco Air Meters, in a day or so.
Jack Sim
Author, Gas Pump Identification book, and Tireflator book.
Author, 1st & 2nd editions of Gas Pump ID book, 3rd edition is now available at
www.gaspumpbible.comAir Meter ID book also available