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 1920 - 1989 (69 years)
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| Sources |
- [S90946] Garth Matthews, Matthews, History of American Crumplers, (Unpublished manuscript, sent to Craig Walsh 14 Nov 2026), Ref W3.3-A5.1#a-1~sp1, Chapter 3: the W2 William and W3 Benjamin lines.
- [S90946] Garth Matthews, Matthews, History of American Crumplers, (Unpublished manuscript, sent to Craig Walsh 14 Nov 2026), Ref W3.3-A5.1#a-1, Chapter 3: the W2 William and W3 Benjamin lines.
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