both English, early 20th century, with broad arrow for British military/aviation use, one with silvered dial engraved 'L Casella London 7172 Compensated' with barometric pressure 15-31 inches, rotating bezel with altitude scale minus 1000 feet to 20,000 feet, aluminium case 7.3cm diameter, in leather case; one signed 'T.A.R.S. & W LTD No. B 620, pressure 21-31 inches, altitude 0-10,000 fet, in gilt brass case 7cm diameter, both pressure tested and bellows working