I've uploaded some more images here - https://picasaweb.google.com/115032973585731669649/December212014?authuser=0&authkey=Gv1sRgCNPiybK08Yb6Ww&feat=directlink
Believe it or not, the engine and frame have matching numbers 34382
This message contains the following health warning for rivet counters: "Images may cause siezures or conniptions"
Some nice early features and some not so nice features......Love the wiring
If the numbers are prefixed with WM20. It must be from contract C7287 in 1940.