Stampdesc Iran, 6c-vio&blk-unissued

desc_issuer: Iran
desc_denom: 6c
desc_color: vio&blk
desc_unissued: 1

Used by 1 overprinted stamp:
Iran postage 1919 6c vio&blk issue=1919a ovpt=Provisoire//1919//(value) oc=blk on=6c-vio&blk-unissued

Description does not match any stamp types!