1938 MIDDLESEX INSTRUCTIONAL/RAILWAYS. Post card of Ilfracombe to Hounslow Middx with KGVI 1d (SG463) cancelled GREAT WESTERN T.P.O./UP cds 17 AU 38, 'Hounslow' crossed through with good strike 'ISLEWORTH, MIDDX' (36x3mm) instructional hand stamp in purple. Unusual. (Ref 86943).