Chelsea Holosteric Barometer A4 Skyhawk The module was used in

The module was used in training versions of pursuit aircraft with instrument flying hoods installed

The cabinet design appears to be repurposed from that used by the Fl22861 Altitude Recorder/Barograph

This is an original course book from the American School of Aircraft Instruments

Inspection stamps of 1940 and 1942 can be seen inside the lid

Chelsea Holosteric Barometer A4 Skyhawk The module was used inThis is an authentic Holosteric Barometer made by Chelsea Clock. This Barometer pairs with the Chelsea Shipstrike Mechanical Clock (see our other listing). The Barometer has not been fully tested for accuracy. Measures 5 3 8 inches diameter and 3 3 8 inches deep.