Turn and Bank Indicator, Type 98, Japanese Army Aircraft P-39 models AD-2 and AD-3 (see

models AD-2 and AD-3 (see photo of instrument panel from its flight manual dated 1950 showing the location of the tachometer)

The clock runs as it should

The compass fluid is no longer present

The dial and glass are intact

and training aircraft

Turn and Bank Indicator, Type 98, Japanese Army Aircraft P-39 models AD-2 and AD-3 (seeThe WWII era Japanese Type 98 Turn and Bank Indicator was used in several aircraft of the Japanese Army according to the Funatsu Aviation Instruments Museum website, including: Type 1 Fighter Oscar Type 2 Fighter Nick Type 3 Fighter Tony (see image of Tony panel from Robert Mikesh book of WWII Japanese Aircraft Cockpits) Measures ~2. 75 inches diameter and ~5 inches long. It is in very good yet experienced condition given its age. The glass and case