It was made in Toyokawa Naval Gun Factory but it looks it was
never finished because this piece lacks the date and serial number.
| Periscope for manned torpedo "Kaiten" found!! |
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| This periscope was designed for Kaiten type-1. It was made in Toyokawa Naval Gun Factory but it looks it was never finished because this piece lacks the date and serial number. | |
 
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Type 93 trench binoculars made by Tokyo Electric (Mazda brand). They merged with Shibaura Works to form Toshiba in 1939. This pair was designed in 1933 and made before 1939. |
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| Carrying case for the Mazda binoculars |
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| Mazda trademark in Japanese characters |
 | This 7X50 pair was made by Toshiba in the WWII era. They are covered with powdered cork instead of leatherette like other late WWII binoculars. |
 | The trade mark was adopted when Tokyo Electric (Mazda) and Shibaura Works merged to form Toshiba and used through the WWII. |