Rater of Climb / Vertical Speed Indicator, Pre-WWII WW1 The drum can be removed

The drum can be removed and the chart replaced as needed

The camera was electrically operated and connected to the torpedo release circuit so that an exposure can be made at the time of the torpedo release

this was used in the reconnaissance aircraft Fieseler Storch Fi 156

It is new old stock in its original box

25 inches diameter and ~2 inches deep

Rater of Climb / Vertical Speed Indicator, Pre-WWII WW1 The drum can be removedThis is an early Pre WWII era Rate of Climb Vertical Speed Indicator, measuring climb or descent up to 2,000 ft per minute. Made by Pioneer, part number 321 1177. At 2. 75 inches diameter, the face is smaller than WWII era indicators. It is ~3. 5 inches deep. The glass is clear and the markings are superb.