I recently got the 1943 Aluminum 5 Pengő coin, and thought it made an interesting contrast with this silver one from 1930. They are both the same size (36 mm), but the silver one is over four times heavier, even at only 0.640 purity. The effect of wartime inflation is striking. Of course, the real inflation would come a couple years later, in 1945-6, when Hungary suffered from history's worst known case (so far!) of hyperinflation. Both coins feature the same person, Nicolas Horthy, who was then leader of Hungary. If you like, please post any Pengő denominated coins or bills in this thread.
When the Red Army held Hungry after the Budapest Offensive in WW2, they printed up occupational currency.