Rate of Climb / Vertical Speed Indicator, Model 1, 100 M/M, Japanese Naval Aviation F4U Corsair

Rate of Climb / Vertical Speed Indicator, Model 1, 100 M/M, Japanese Naval Aviation F4U CorsairThis is a fine specimen of a Vertical Speed Rate of Climb Indicator, Model 1, as used in aircraft of the Japanese Navy during WWII. It measures rate of climb or descent in up to 100 meters minute. The calibration screw is on the rear of the instrument at the 3 o'clock position. Although the instrument is missing its data plate, it appears identical to the one illustrated in Robert Mikesh's book Japanese Aircraft Equipment 1940 1945, see photo, which

appeared just right of center on the co-pilots panel (see photo of Victor instrument panel)

Cabin Altitude Selector

as used in the US Army Air Force's Boeing B-29 Superfortress (see illustrations of B-29 Flight Engineer's instrument panel showing instrument location)

The liquid has since evaporated

part number 1556-2K-A

such as the F6F Hellcat

According to our friends at Wikipedia:

BU AERO USNAVY is embossed on its face

and adjusted by AeroAntique

or it was sourced there

but reveals another sealed metal plate

The N-1 system is a remote-indicating