Brazil 1979 UPU Rowland Hill imperf souvenir sheet overprinted 'British Flying Post Office, Air Mail 50p' in green unmounted mint

Name: Brazil 1979 UPU Rowland Hill imperf souvenir sheet overprinted 'British Flying Post Office, Air Mail 50p' in green unmounted mint
Brand: AGStamps
SKU: 26740
Price: 4.25 GBP
Availability: InStock