File:1920-henry berliner being steadied in helicopter at CPA.jpg
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Summary[edit]
| Description |
English: Henry Berliner with a prototype wingless helicopter |
| Date | 14 May 1920 (per handwritten watermark) |
| Source | Own work |
| Author | BajaBlaster |
| Other versions |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:57, 28 September 2020 | | 3,000 × 2,378 (315 KB) | BajaBlaster (talk | contribs) | Cross-wiki upload from en.wikipedia.org |
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