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Continue to ChatDhufar 1976 US Bicentennial Sheetlet (2R, CTO) https://www.grahamlandstamps.co.uk/shop/stamps/cinderellas/overseas-territories/dhufar/dhufar-1976-us-bicentennial-sheetlet-2r-cto/
Dhufar 1976 US Bicentennial Sheetlet (2R, CTO) https://www.grahamlandstamps.co.uk/shop/stamps/cinderellas/overseas-territories/dhufar/dhufar-1976-us-bicentennial-sheetlet-2r-cto/