Stampdesc French offices in Zanzibar, 25c-unissued

desc_issuer: French offices in Zanzibar
desc_denom: 25c
desc_unissued: 1

Used by 1 overprinted stamp:
French offices in Zanzibar postage 1902 2 1/2a issue=1902 oc=blk on=25c-unissued

Description does not match any stamp types!