1931 envelope addressed to Newcastle on Tyne. Franked 2 x 3d and asinglev 1/- Lakatoi overprinted 'AIR MAIL' tied 'SAMARAI E.D.' c.d.s. '18 JE 31' On the reverse Great Britain 1/2d tied Newcastle cancellation '17 AU 31' This was used to test the airmail service.