18-20 (23-25) 1896 2½a on 1a plum Q Victoria stamp of India with "Zanzibar" overprint surcharged in black, Stanley Gibbons surcharges Type 3-5 (Scott Type a-c) cplt, undercatalogued as SG 24 (Scott 19) only occurs 10 times in the setting of 60.
© 1975, 2019. ColonialStamps.com. All rights reserved.