Based on the information I have obtained so far, the first outboards made as "Scott-Atwater" (not champion) post war, were done in drab olive green. I have seen several originals and have a couple myself. What is interesting to note is that I have seen variations of this off green color. While variations are not that uncommon, It is important to remember that Scott-Atwater was engaged in the manufacture of arms and parts for planes during the war effort, as were most if not all manufacturers of leisure outboards. The drab green is suspiciously close to the color of the armoring casings and other equipment used by the military. Was it paint left over from the war effort??? Possibly? not sure.

I would suggest (if you have not already done so) removing the outer cowls and looking for over-spray on the underside of the cowls as this may provide some hints as to the original color. I have not seen an early Scott-water post war in the color you have posted.

Hope this helps.

Kevin
Aka: Skeg