Stampdesc French offices in Zanzibar, 1fr-unissued

desc_issuer: French offices in Zanzibar
desc_denom: 1fr
desc_unissued: 1

Used by 1 overprinted stamp:
French offices in Zanzibar postage 1902 10a issue=1902 ovpt=10//ANNAS oc=blk on=1fr-unissued

Description does not match any stamp types!