German airplane builder (1884–1969) known for the Dornier Do 18 and the 12-engine Dornier Do X flying boat. Four items, including: a 1933 ALS about creating a family tree; a 1934 ANS offering thanks for birthday wishes; a 1935 TLS concerning an annual contribution; and a 1940 ALS offering thanks for a “book about Manzell.” In overall fine condition. Accompanied by several newspaper clippings. Pre-certified PSA/DNA.
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