Stampdesc Belgium, type=parcel post-5.50fr-unissued

desc_issuer: Belgium
desc_function: parcel post
desc_denom: 5.50fr
desc_unissued: 1

Used by 1 overprinted stamp:
Belgium military parcel post 1939 3fr oc=blk on=type=parcel post-5.50fr-unissued

Description does not match any stamp types!