51th Auction - Day 2

Neuguinea - Australische Besetzung 1914/1915: 1915, 2d grey and 6d ultramarine kangaroo, both punctu
1915, 2d grey and 6d ultramarine kangaroo, both punctured with small 'OS', together with New Guinea 1d red KGV on fragment, tied by oval RABAUL / NEW BRITAIN, JUN.18 1915, h/s in violet (Powell #53). F/VF condition. Scarce mixed franking, obviously used on commercial mail!