my dad got a new head for his mk1 which also had no markings like original, however there is nothing wrong with it, its a perfectly good head. made in SPAIN. i would wager that these are the same.
i can vouch for the IP components (have bought rebuild kits, seals, camplates) as well as the injector tips for IDI (seem to be OEM, work great) and a set of door locks which also work great but i think they were made in china or something.