I am the author of the Gas Pump Identification book. It id's over 1900 gas pumps from 1885 to 1965. You can get a copy at my website:
www.petrocollect.comIn the meantime, please find the ID tag on the pump and give us what is on it. We refer to pump first by the name of the company that made them, then the model number. It really doesn't matter who used them (Shell, Texaco, etc.) as these pumps were sold like used cars.
If your pump is really that old (and it doesn't sound like it is from 1906, possibly 1912-1920), but it is probably shown on my website. Go to the literature section, then click on the name of the company who made it.
While there were a lot of small companies making pumps at that time, the larger companies were: Bowser, Gilbert & Barker, Milwaukee, Tokheim, Wayne and Western. You can probably find a picture of it on my website.
Jack Sim