Hong Kong 1936 Airmail Envelope to Penang

Cover to Penang bearing SG124, 10c blue and silver Jubilee SG134, 5c olive and grey (2) tied by Airmail Hong Kong double-ring with boxed First Flight cachet, returned with "Not claimed" and Retour with oval "Dead Letter Office Penang" and circular Returned Letter Office Hong Kong applied in Kowloon. (pt)    ID: 25553