Tonga. 1903. Registered envelope written by 'Dr Maclennan, Medical Department, Tonga, South Seas' (on his official envelope) addressed to San Francisco bearing 'SG43, 2 1/2d black and blue (strip of three) and SG 46, 5d black and orange tied by Nukualofa/ Tonga date stamp '17 Feb 03' with San Francisco/ Reg Div.' double ring arrival 'March 24' in violet on reverse.
Very attractive item.