Some years ago, circa 2001, there was a guy who paid through the nose to build an all-NOS HK1. Must've made a lot of ebay sellers very happy in the process. I never saw him lose an auction on an NOS HK1 part; it was entertaining to watch. One of the items he won was an NOS service replacement frame. Once the bike was complete, color match was an issue between the various painted parts. Worse yet, he decided that the reality of a totally stock bike fell short of his dream. You guessed it, without a VIN & title he lost his ass when he sold it. As I recall, it didn't even crack the $2000 mark, at a time when a first-rate restoration would reasonably have been expected to fetch $3500 - $4000.
In terms of bikes delivered without VINs, I've seen two. Both were early production ST70s. The sidebadges were different between them and the only examples of those specific designs I've yet seen. No idea whether these came off the line VIN-less or if the frames were service replacements. Considering some of the anomalies we've seen, the former wouldn't be too surprising. I've just never run across this with a CT70. Different countries, different laws. The US of A has been pretty strict about requiring VINs. On the other side of the world, 40 years ago, who knows?