Craven wrote:Only have limited resources but for instants, Chelmsford used, AR, JN, HJ, HK, PU, may be more but it’s combination that showup bogus numbers. That’s why I say you need some other cross reference.
You were correct, no KARs ending in B. It seems the Chelmsford (Hertfordshire) office issued all of the KAR1-999 series in 1965, so they all had the C suffix (such as the now famous 120C). This, of course, makes the most sense given the lotus records on the car.
Hertfordshire County has an online archive with some basic information, including a hierarchy tree of records of registrations issued between 1903 and 1977. The following screenshot includes part of the listing.