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

Name: Brazil 1979 UPU Rowland Hill imperf souvenir sheet overprinted 'British Flying Post Office, Air Mail 50p' in blue unmounted mint
Brand: AGStamps
SKU: 26741
Price: 4.25 GBP
Availability: InStock