Yes hi there Mike, you've got a good memory! My 260Z & Mustang both got here to (Brisbane) un-marked thanks to a very careful shipping company.
Yes my NZ-new car just has the factory chassis ID plate as per the upper image in Aegean's post on page 1; no 'compliance' plate was required to be fitted; therefore no helpful date data as the Australia-new cars seem to have received.
A former Nissan assembly-plant employee told me many years ago that he thought that approx 200 240z & 260z cars were imported & sold new by Nissan NZ, which doesn't sound like much until one remembers that Jap cars were still fairly new on the scene in the early 70's; but that is the only import info I've ever heard of. The rest of the Zeds we see around in NZ are apparently personal imports from Australia (mainly), ex-UK or Hong Kong, & quite a few ex Japan as 'grey' used imports (often with 2L motors & lots of rust), plus a few in LHD or ex-LHD form from the USA or Canada or Europe or wherever. Anecdotally I've heard that there are an estimated 600 Zeds in NZ, but how people can even begin to work that out I don't know - I would presume that the majority of those are in varying degrees of condition & completeness & stashed or secreted away as 'future projects'. Mike, you can probably shed some light on the above as it is interesting. I would like to know what the situation is in Australia; I generally see well-optioned 2+2's around over here but not many 2-seaters.
Regarding the 'K' in Mustang chassis numbers - it refers to the factory-fitted engine specification, being in this case a high-performance 289 cu in V8 rated at 271 hp. Not very common, as most purchasers opted for lower-hp-rated small-blocks, or, from 1967-on, a (cheaper) big-block. So if you know someone with a 'K-code' Mustang then they have something pretty desirable today.