Three pocket barometer/altimeters , the first by 'Negretti & Zambra, London 25328' engraved to side 'A.J. Power RN' 0-10,000 feet, 5cm (2.5 in) diameter overall, in original double opening red leather case, compass missing , the second by the same maker, 0-8,000 feet altitude, 4.7cm diameter overall, in a red leather case A/F , the third with engine turned case, with 0-15,000 feet altitude scale, 4.7cm (1 5/8 inches) diameter overall, in a red leather case (3)