British Antarctic Territory stamps
P=have O=don’t have it
The British Antarctic Territory (BAT) is a sector of Antarctica claimed by the United Kingdom as one of its 14 British Overseas Territories, of which it is by far the largest by area. It comprises the region south of 60°S latitudeand between longitudes 20°W and 80°W, forming a wedge shape that extends to the South Pole, overlapping the Antarctic claims of Argentina (Argentine Antarctica) and Chile (Chilean Antarctic Territory).
Inside #596-610: BAT #1-15O
Inside #611: BAT #24O