Steve:
I was answering your question: "Have any 14xxx-17xxx vin sandcasts been discovered in Germany ?"
It is not possible, while bikes for France had to be just for France to pass regulation for lighting and so on. So these can´t appear in Germany or other countries, while they have different model of CB750.
Gerard:
same about that 14xxx-17xxx would be for UK. There were just officially imported bikes from frame number 10xxx and especially UK CB750s were different than bikes for another countries. So hard to be possible.
Strange there is so big spread among 14xxx and 17xxx. Hard to beleive, that Honda will make 3000 bikes with snadcast cases, or just to replace random diecast series with sandcast cases. And question is, why Honda would make any special new clutch cover9/10? It has no sence. It costs money and time.
It would be nice to see any really completely original french snadcast CB750, not restored, not modified. I think this could be only proof that Honda did it, not local importer or dealer, or customers.