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 1904 - 1985 (81 years)
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| Sources |
- [S90946] Garth Matthews, Matthews, History of American Crumplers, (Unpublished manuscript, sent to Craig Walsh 14 Nov 2026), Ref J5.0-A7.7#e~sp2, Chapter 4: the J5 Benjamin line.
- [S90946] Garth Matthews, Matthews, History of American Crumplers, (Unpublished manuscript, sent to Craig Walsh 14 Nov 2026), Ref J5.0-A7.7#e, Chapter 4: the J5 Benjamin line.
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