The blasted head (left) is correct. Model 2 early through to early sheerline are the same. (This includes model 3 4 auto and model 5s and any utility running the model 5 engine) Model 1 is also similar style just with thicker guage fins. The first head change was the later sheerline. Centre plug hole and the two 1/4 mount holes for the cowl. The head on the roto engine pictured is neither model 2 or sheerline. Head change date would have been 1961 approx. Im unsure what your second head is off, mid 60s models on maybee? As for the badge the rear will tell you model accuracy. Models 2 , 3 through to 10 and 12 utilities should be the same. The red edge is irrelevant. The reproductions are heavier flat on the back and often with more casting bubbles on the rear. They are also pliable you should be able to bend them with moderate effort. I have seen 2 replica styles only. Without seeing the rear of the second its harx to tell if it is a replica.
