Thanks for all the help, Les. DON"T let that book out of your hands. Talk about a piece of history!!! Now I have one you may not be able to help with-4X5 Telescopic, Serial No. 102222. Like all the rest, it takes better pictures than I do.;-}
Don

Remember that part about 'sometime around 1921 they started dating the jobs'? Well yours is before that. Other historians have added footnotes, some right some wrong. If I were to put this on ebay I say "WWI" era. If pressed harder I'd hazard an estimate of 1916.

Thanks, that's about what I thought. The Graflex guide that I can't find right now :-{ mentions the shape of the side plates being pre-1918. Anyway, thanks. I am out of cameras to date, for now.
Don