Stampdesc French offices in Zanzibar, 15c-unissued

desc_issuer: French offices in Zanzibar
desc_denom: 15c
desc_unissued: 1

Used by 1 overprinted stamp:
French offices in Zanzibar postage 1902 1 1/2a issue=1902 oc=blk on=15c-unissued

Description does not match any stamp types!