This is a piece of Notgeld from Austria. A little catalogue can be found here or here.
At that link you find pictures like this:
It is indeed made of wood and now quite scarce to find.
The "made of wood" is emphasised if the full transcript is readable:
Obverse: 10 Heller
Reverse: Notgeld – des – Ludwig Altzinger – Holzindustrieller – Zell bei Zellhof – anno 1920
The type of wood seems veneer. More general background for the financial and economic situation of and in Austria shortly after the war is at Notgeld 1918–1924. Heller is the 100th part of the official currency Krone during the Habsburg monarchy, backed by gold. These pieces were issued locally by an 'industrialist in wood' (Holzindustrieller) who had an ample supply of wood in Zell (now Bad Zell).
Inflation in Austria began much earlier than in Germany. In Austria the value of the Krone went down from the start of the war and inflation reached 1500% by the end of the war compared to 1914 (officially the German Mark just had a rate of 200% up to 1918). This type of money was in official circulation until October, 1st 1921, but lost any real world value before that date.