Smiths Mk20A Sensitive Altimeters.
Ex-military, built to high specification 0-35,000' with calibration report, large vide millibar sub scale, which has a big range to allow QFE operation at all high level airfields, 6'o'clock setting knob

3 Zeiger "Fuß" Höhenmesser von Smith "Mk.20A" mit 6-Uhr QFE Knopf