Stampdesc Danzig, 500m-unissued

desc_issuer: Danzig
desc_denom: 500m
desc_unissued: 1
desc_denom2: 500m (# 5522)

Used by 1 overprinted stamp:
Danzig postage due 10/1/1923 50000m issue=1923 due ovpt oc=blk on=500m-unissued

Description does not match any stamp types!