This is a Zanzibar Provisional SG 21, issued in 1895-98. It has a 2 1/2 Type 3 IN BLACK on a 1 Anna Plum.

It is in Fine to Very Fine Mint Condition with Original Gum.

SG 21 is valued at L180 in the Stanley Gibbons Catalogue.

This item is over $100 USD so I will ship it using Priority Mail in the US, and Registered Mail Overseas.  This is to ensure that it reaches you in a safe and timely manner, and includes tracking!