I'll include the link but not the actual post; it was a bit long. Here's the opening paragraph: "From 1933 through 1945 Japan issued coins for their occupation of China. I stumbled across this while looking for my worldwide birthyear coins (1941). It caught my fancy and was not a particularly large group; about 70 mostly inexpensive coins (if you stay away from UNC). They were struck in copper, CuNi, Bronze, Aluminum and Fiber. A question about the fiber coins later. So I started collecting them." But if you want to see images here's where: https://www.cointalk.com/threads/a-side-collection-china-under-japanese-occupation.298271/ Why repeat this? I just picked up an upgrade to one of the coins, the 1945 Fiber 5 Fen. It was almost the end of the war and the Japanese were running short on metal, so they started striking coins in fiber (think a cardboard-like material). 16.2 mm and .66 grams They'd probably blow away in a stiff breeze. Krause lists the fiber coins in both red and brown, but the thinking now is that the brown ones were just toned red ones. According to Krause there would be 67 coins in a full set. I've got 62 (about 92% of the set). Not surprisingly the ones I don't have are more expensive running in the $50 to $800 range. So now I'm restarting the hunt for the 5 coins I'm missing.