Would this be a very late coupelet?
Looks likes to me that the box is installed over the trunk of the car. As close as its sitting to the back of the cab it would fit right over it. Or at least I think so.
The demountable wheels points towards a 1919-23 coupe, but it's hard to tell the difference from a 1918 couplet in this grainy photo.. A late coupelet would have all three door hinges below the side windows and there would have been two belt mouldings while the 1919-23 coupe only had one.
I think John Danuser had a salesman's body just like this at Chickasha around about 2003-2005.
'Oshkosh' is also the home and host of the annual EAA Fly-In.... Right, Ron P.?
Marv, Yes, Oshkosh is the home and host of the annual Experimental Aircraft Association.
Our Club, The Dairyland Tin Lizzies are there with our T's and give rides.
Keith - Hoping you make it 'back' in time!
If it was a 1918 coupe it would not have demountable wheels, and it would have kerosene cowl lamps and tail lamp.
Unless it was a few years later and those things were changed...
Things in the used car business haven't changed much in the last hundred years... I could easily see a two or three year old '18 coupe getting hit from behind then eventually ending up on a used car lot around 1921 with a salesman's body (value added feature that insures it will be sold to a company not an individual - and the driver likely will not be the owner), shiny paint job, newer junkyard engine, and all the equipment of the most recent models for "a significant savings over the new model"...