I thought the Erma Lugers were banned from import in '68 (didn't make the point total needed).

Stoeger then imported the Erma parts, but not the the receiver, after '68. The new receiver being made in the USA to get around the import problem and the Stoeger pistols were assembled (made) in the USA.

Stoeger Corp could legally put 'Luger' on the pistol as they owned the rights to the name in the US since the 1920's when they were the sole importer here.
..and then again I may be all wrong!