Was the Bf109 (from WNr a K-4) a drawing or a photograph? The WNr seems a bit out of the known range. Oberammergau-Fahrgang is also unknown to me; Oberammergau-Friedhof yes.
Just in case you donīt know this website - some other Oberammergau mysteries revealed:
http://herbert-thiess.de/Laber/