The link below is one of the best explanations that I have seen. But I have seen a lot of "HIN's" that could not be explained by this. My own H37C looks like: HUN37074M79H. That's #074 built in August of 1979(79H). Not sure if "M" means modified. There are several other explanations in the "Forum Archives".
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.