thanks so much for your valuable contributions and pictures. Both bikes seem to have -57 kicker covers?
About batch production:
Of course I was not there in 1955 and honestly speaking I now nothing about the reality of motorcycle production from this time. Still, from a planning perspective it would make a lot of sense to me to assemble at least 10 or 20 bikes in one go (as extra parts need to be mounted). Patrick, I would not talk about that topic and it might be coincidence, but I found these serial numbers (just for additional information):
These are the cases I got from Mike:
- IMG_4004.jpeg (96.88 KiB) Viewed 28342 times
These are cases that came up in a caimag post:
- 55KHRM1272.jpg (85.05 KiB) Viewed 28342 times
And this bike is from a Mecum auction in 2015 with engine number 55KHRM1273:
- img_VDreTUN0cZ.jpeg (330.85 KiB) Viewed 28342 times
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