SINGAPORE - KUALA LUMPUR - INTERESTING CASTLE COVERS: 12 Dec...

SINGAPORE - KUALA LUMPUR - INTERESTING CASTLE COVERS: 12 Dec. 1955 env. from Baldock to Singapore bearing a single Castle 2/6d for a 2oz letter. 28 Nov. 1968 9d air letter from London to Singapore bearing Machin 3d (2) and Castle 2/6d for a 1oz letter. 7 Apr. 1966 parcel piece from Plymouth to Singapore with Castle 2/6d to 10/- paying the £1 15/- for a 2 lbs air parcel. 20 Aug. 1957 env. from London to Kuala Lumpur bearing a single Castle 2/6d paying the 1oz letter rate. All are air mail zone "B" items. (4 covers)