- Collection of
- Edo-Tokyo Museum
- Title
- Rotary Protractor
- Collection ID
- 90365294
- Category
- Lifestyle and Folk Custom
- Sub Category
- Transportation and Commerce
- Creation Date
- 19～20世紀
- Size
- 11.4 cm x 4.5 cm
- Materials/Collection
- Akagi Kiyoshi Collection
- Edo-Tokyo Museum Digital Archives
- https://www.edohakuarchives.jp/detail-58955.html
