1936 MAIL MANCHESTER TO ARGENTINA/2/6 RE-ENGRAVED SEAHORSES (SG450). Envelope (small part rear flap missing) Manchester to Buenos Aires, Argentina on printed envelope "VIA FRANCE", on front 2/6 re-engraved Seahorse (corner bend) (SG450), KGV 6d (SG426a) and 1s photogravure (SG449) cancelled MANCHESTER date stamps 15 MY 36. On reverse and apparently unnoticed by British Post Office another 2/6 re-engraved Seahorse (SG450) and photogravure issues 1½d red-brown (SG441) x 2 and 2½d bright-blue (SG443) block of six, partly cancelled with PARIS and BUENOS AIRES date stamps. Unusual usage. (Ref 108598).