India 1937, From October the service between Karachi and London was operated by Short S23 Empire flying boats. The S23 flying boat Cygnus left Karachi on 2 December and crashed when taking off from Brindisi in Italy on 5 December. A steward and a passenger were killed. This cover is postmarked  November 1937 in Wellington and joined flight IW 604 that had left Brisbane on 25 November. It is one of 8,000 from New Zealand salvaged after spending several hours underwater. The cachet DAMAGED BY SEA WATER was applied in London. There is a faint handstamp on the front (presumably applied by the receiving company) with the date 15 December.