Yes this head has not been touched, done about 50000km's so is still very fresh.

Errol (Datrats) uses a german guy who is very very good at what he does, the ports are so smooth its not funny. done by a Pro

Comparing how mine looks (The car's one and the two spare ones in my cabinet ) I can also say it's a genuine GX head. They don't have numbers only the NISSAN wording like yours.

These pictures, has it been taken recently when the head was removed? If so, those ports and combustion chambers look mightly clean for a used head. I am also planning to get mine done a bit with polishing and cleanup of casting imperfections.Hope it looks the same even after use.

Thanks Dodgeman just intresting there is no Cast number, and some funky hand written number.

Will get on with selling her

Well it's a real deal 1200 GX head, it hasn't had any marking ground or machined off, & there are no casting numbers on it, so you have it in one.
The geniine 1200 GX head does not have a casting number on it at all.

This is another GX head.

HI guys, im about to try and sell my A12GX head (been ported/flowed and rebuilt)...

But just wondering where the Cast number is for it, i cannot find a number at all, was this typical with datsun heads where the cast was just left off??

There is a intresting hand written scribe casting (raised not cut into the head, so done during the casting) on the head under the thermostat : reads 1-4-2P-6

Have a gander at the pics below.