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 1900 - 1972 (72 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- [S90946] Garth Matthews, Matthews, History of American Crumplers, (Unpublished manuscript, sent to Craig Walsh 14 Nov 2026), Ref J5.0-B5.3#a-3~sp1, Chapter 4: the J5 Benjamin line.
- [S90946] Garth Matthews, Matthews, History of American Crumplers, (Unpublished manuscript, sent to Craig Walsh 14 Nov 2026), Ref J5.0-B5.3#a-3, Chapter 4: the J5 Benjamin line.
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