In around 2000 I wrote a Air Meter Identification book. I had it printed myself (only 200 copies) and it IDed around 50 different air meters.
While most guys have associated me with gas pumps, the things I collected and restored were air meters. When it comes to ECO 90 series air meters I have restored over 450 of them, and at the present time, Cindy and I are the largest suppliers of ECO parts in the world. Recently I have sold a very rare, restored, meter for over $7500, possibly the most ever spent for a meter.
In 2008, as I was waiting for my 2nd Edition of the Gas Pump Identification book to come out, I wrote another Air Meter Identification book, again I published it my self. This time, the book Identified 450 air meters made since 1917.
If you are looking for information I would suggest you start by going to this page of my website: http://petrolianacollectibles.com/
Click on the bottom, this will take you to a page of where you can click on just about anything on my site: gas pumps, air meters, nozzles, you name it.
Our assumption is that you have an ECO, if so, click on that and see all the ECO meters that were made.
This website will exist as long as Cindy and I are around, so I suggest you copy as much as you can.
If we can help you with your restoration, send us an email: firstname.lastname@example.org
Jack & Cindy Sim