Mention of the Mini Gem triggered a recent memory.
Amongst other things, I engrave compliance plates for strange vehicles as they pass through the (Australian Capital Territory) registration system.
A recent customer was a young man who was running the last yards towards rego on a 1969 Mini Gem. This car had certainly started to be assembled in 1969, but having passed through something like 8 subsequent owners, without achieving rego, the powers that be had decided that this vehicle should be treated as a 2010 build.
The poor bugger was being leant on to achieve 2010 emission levels with a 1969 BMC A series motor!
Fortunately some semblence of reason was finally discovered by the authorities, and rego ensued. The man is now the (very) proud owner of a very rare car, and he is commended for showing it at the various shows.
Clive