I don't think it is a 25, I believe it is a "High-way Visible."
Dayton came out with this pump around 1915, none of their literature lists a model number.
In 1920, they added the visible attachment to it and called it the "High-way Visible."
The reason I believe it s the HWV, is that there is no apparent meter/gauge (I don't think there was one as there are stops on that rod), and it has that almost flat plate half-way up the pump. You need to take a good look at the visible part, as I also believe they offered visible attachments that could be attached to the original 1915 pumps.
Most of us don't consider the hose as part of the value as most hoses are too far gone to be usable, but we do like to see a nozzle. I valued the pump at $2500 in my book, so if you can get the skins made and a nozzle for $500 you are still in the ballmark.
Take a look at the picture on the bottom of page 125.
Jack Sim
Author, Gas Pump Identification book and Air Meter Identfication book. See both at:
www.petrolianacollectibles.com [This message has been edited by Jack Sim (edited 11-26-2008).]
. Decisions/decisions!