I am now a proud owner of Jack's book, and I have to say the book is not what I expected but I loved every page. I still am not sure what I have. By the picture of the square body clock face the fuel discharge and the nozzle holder are on different sides, mine are on the same side like the picture of the 950. My face plate says 850 but its a reproduction. Did some 850s have the discharge & nozzle on the same side?