1907/1955, PIONEERS IN ANTARCTICA, New Zealand, 1 d rose-carmine cancelled by green cds BRITISH ANTARCTIC EXPD. NZ, FE 27 08, on official cover of Shakleton's ”Nimrod” Expedition (1907/09), together with 1 d ovp ”King Edward VII Land” and 2 x 1 d ovp ”VICTORIA LAND”, each tied by cds BRITISH ANTARCTIC EXPD. NZ and different dates 4 MR 09, 9 FE 11 a. 31 JA 12 marking the timeline of following expeditions by Shackleton and Scott (1910/12). In addition Australia 3 1/2d stamp cancelled by cds MAWSON, 16 FE 55, the first australian permanent base in Antarctica. Cover from ex Burrus Collection, expertized Mohrmann. (M)