File:Challenge Hi-Speed Quoin (external).jpg
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Summary
| Description |
English: Top view of a Challenge Hi-Speed Quoin, model H M47, by The Challenge Mchry Co, Grand Haven, Michigan, U.S.A. The hole to the right of center is for a quoin key. The quoin is about 190 mm (7.5 in) long, and 18 mm (0.7 in) tall. The width expands by about 10 points, from 17 mm (0.68 in) to 21 mm (0.82 in) as the quoin key is turned clockwise. |
| Date | |
| Source | Own work |
| Author | Comfr |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 22:49, 4 July 2016 | | 5,184 × 3,456 (12.6 MB) | Comfr | User created page with UploadWizard |
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