50 Pfennig

Westerburg is a small town in the Westerwald, and its 1920 notgeld issue was one of thousands of emergency municipal denominations printed across Germany as coin shortages — exacerbated by postwar hoarding and metal requisitions — made small-change transactions nearly impossible. Albert Fastenrath in Elberfeld was a regional commercial printer, not one of the major security printing houses, and municipal contracts like this were bread-and-butter work during the notgeld boom years.

The reference number 1412.2-2/3 within the DeNG catalog indicates a specific plate variant within the Westerburg series — worth checking against the other listed variant if building a complete municipal set.