| Navy Artificial Horizon | Navy Artificial Horizon Model 1 | ||
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| Tokyo aviation Indicator | Tanaka Indicator production place | Mitsubishi Electric Corp | |
| Army Artificial Horizon Model 98 | Made in U.S.A. | Made in England | |
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| Tokyo aviation Indicator | Tokyo aviation Indicator | Probably Sperry | unknow |
| ※ Navy Artificial Horizon Model 1 and also Army Artificial Horizon Model 98 are the diameter of 11 cm together. It is large for Indicator. ※ The Artificial Horizon made in England is the Indicator that was used to the compound leaf aircraft of Gradiator and also Swordfish etc. ※ There is the possibility that produced imitation or license to, Army Artificial Horizon Model 98 clearly. ※ It is said that it is same to Navy Artificial Horizon Model 1made in Tokyo aviation Indicator. However, it is seen this Indicator even as the same as Artificial Horizon made in U.S. |
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| Navy Artificial Horizon Model 2 | German Artificial Horizon | ||
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| Tokyo aviation Indicator | Tokyo aviation Indicator | Askania | not able to read it |
| ※ Navy Artificial Horizon Model 2 are the
diameter of 8 cm together. It is Middle for
Indicator. ※ The center is not Tanaka Indicator production place and be Tokyo aviation Indicator. Furthermore, as for England production, the middle size, U.S. production are a large Indicator. |
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