What is the configuration of a model 1846?
What I know about Tucker model numbers would suggest that this is an 1800 series with 4 tracks and 6 doors. Sounds pretty cool.
I've got a '77 model 1742 - 1700 series, 4 tracks and 2 doors.
I don't know that I've ever seen an 1800 series Tucker. The standard models of that vintage were the 1300 and 1400 series (4 wheel track carriers), 1500 series (5 wheel carriers), and the 1600 and 1700 series (6 wheel carriers). I also remember seeing a 2700 series that was a heavy-duty 6-wheel carrier model.
Are you sure it's an 1800 series? I suppose it could be a special order or limited run model.
Somewhere I've got an owner's manual for my 1742. If you can't find any others (and I can find it) I'd make you a copy.
I'm very interested in seeing some photos of this 'Cat.