I’m currently restoring a 1937 Champion Deluxe Light Twin. I believe your Viking Twin would be somewhat similar to mine but not identical. Your engine crankcase, cylinders and gearcase would be a dull aluminum color. Your driveshaft tube could be painted brass or polished brass (I’ve seen both). Not sure about your fuel tank – mine was chrome finish. Here’s a picture of my ’37 as it sits right now – I’ve posted progress pics under the Current Projects section here on the Forum. One other note on yours – it looks like the rope plate may have been changed out to a non-factory piece at some point in it’s past life. The Champion twins usually had a rope plate similar to mine – see pic. Some of the Champion motors had a rope plate similar to yours but they still had the “Champion” name somewhere on the plate.
Bob
1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."