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| name | Brass Key |
| description | Three flat metal keys each with five teeth at the blade and bow is hollowed out with three decorative circles. The keys are attached with a metal link. |
| history of use | This item is from the household of Jinzaburo and Yae Oikawa |
| part of | Jinzaburo and Yaeno Oikawa collection |
| number | 2009.2.135 |
| organisation | Nikkei National Museum |
| access | Open |