BRITISH CENTRAL AFRICA – 1903, KEVII £10 gray and blue – Worth US.$5,500 10/06/2024 ADMIN 0 1903 KEVII £10 gray and blue, l.h., well centered, fresh and v.f., signed Gebruder Senf, also Enzo Diena, with his 1990 certificate (SG 67, £9,500)