India 1925 GV Official 1r on 25r, error: surcharge inverted, mint, lightly hinged. One of the most elusive GV stamp – extremely scarce and undercataloged, from the only sheet printed. SG O103a £7,500. 2024 BPA certificate

Catalogue No: SG O103a; Scott O71a
Catalogue Value: £7,500
Type: Mint