West German Name for Former East German Currency

This page is the CodyCross answer for the clue below from London, Group 495, Puzzle 2 (Oyster Card).

Question is: West German Name for Former East German Currency

and the answer is: OSTMARK

Word Meaning:

OSTMARK — (historical) The currency unit of the former German Democratic Republic (aka GDR, DDR, East Germany) until 1990, abbreviated DDM.

Definitions from Wiktionary.