Doug Murray wrote:

"Len:

Nothing odd north of Czechoslovakia. Danzig is shown with a border
around the area (from Gdynia to the west, and Elbing to the east).
Trieste lies fully within Italy."

The map could be from WW2 to the 'seventies, if it was made in West
Germany or by a company sympathising with the West-German viewpoint
of things. Until well into the 1970's there were maps giving Germany
its 1937 boundaries, at least in the east, with sometimes a smaller
boundary indicating the de facto boundaries, all cities bearing
German names, and sometimes with the remark "z.Z. unter Polnischer
Verwaltung" or "z.Z. unter Sowjetischer Verwaltung", i.e.
only "administered" by other countries, but German nonetheless. This
all had to do with the West-German non-recognition of the Oder-Neisse
boundary, as I recall correctly.

Gdynia would still stay Gdynia, although there is the German exonym
Gdingen, but it had to be made clear which boundary (West-)Germany
recognised as the de jure one (not only their own, but also of the
Danzig Free State). By the way, in WW2 the name Gothenhafen was
thought up for this city...

Peter S.