Its an F1, but could have sat in a crate in a warehouse unfegistered till 79. Yes all NEW 750 in 79 were DOHC BUT a lot of older models were unsold due to rumours of the "new" bike comming
And to add to that....when/if that 75 F1 was sold in 79, it was titled as a 79(the year it was 1st sold and titled) . This is the reason there was a class action suit in the mid 70s in the US and the results were that beginning with the 1976 model year, Honda put the model year on the steering neck vin plates(so this wouldn't happen anymore).
But I don't know if other parts of the world followed the vin plate updates to include the model year on the plate.
Pictures show a 1974 vin plate, a 1976(has model year in lower right corner) and a 1978 model(has bigger font for model year)
and to add to that...for American Honda...
Honda approved model year designation policy in 1973...ending sell date/release date policy.....
Official model year designation began in 1974.....however
There does not seem to be any frame data plates for '74-'75 models stating "Model Year".......so title/registration paper work could still be "wrong ?"...or would it?......hence, the lawsuit......
so, yep, 1976 and up American Honda model frame data plate says model year.......
.......that happened numerous times...unsold models titled the year they were finally sold....
prior to 1974, some hondas were officially "released" in a year, but not officially "sold" until the next year.....
um, that bike appears to be in excellent shape........$1800 just might be a steal...