1000 Marks

The Polska Krajowa Kasa Pożyczkowa was established in 1916 under German occupation authority as a parallel monetary institution for the General Government of Warsaw — a deliberate administrative move to detach the occupied Polish territories from the Russian ruble zone. These marks were not a Polish national currency in any sovereign sense; they were an occupying power's tool, denominated in a unit aligned with German fiscal interests.

The 1000 Mark denomination was the highest in the PKKP series, which made it primarily an instrument of large commercial settlement rather than everyday exchange. Surviving examples in genuinely circulated condition are less common than the lower denominations, which passed through far more hands.