You have a pm.I have one dated on the inside 1977. Issued January 1978 on the back cover.
Datsun 260Z, Owners manual, model S30 series. ( on the front).
On the back cover has a couple of years servicing,hand written.
If any good PM me your address, will post tomorrow.
Steve
Last time I looked they were too expensive and for US market models, I want a UK market one.have a look on US ebay . i got 2 280z owners manual for $2o the first is worn with a faded front cover and the other is near mine . keep an eye on the postage some folk charge a lot just haggel