A Group of De La Rue Test Notes, comprising a 50 ‘wind’ units, obverse printing only, with annotation on reverse ‘orbital affect spark’, a ‘textmark’ test note, obverse only, with Frank Lloyd Wright watermark, and Shackleton, Antarctic Voyage, 20 units (3), all with reverse not fully printed and different braille tests on obverse, generally uncirculated, unusual (5 notes) £200-£260