German engineer (1838–1917) who designed the famous rigid airship that bears his name. Vintage 7 x 9.25 paperstock photo, affixed to a 9.5 x 12 mount, signed on the mount in fountain pen. In very good condition, with scattered surface marks and foxing to image, as well as some light spotting and creasing to mount. Pre-certified PSA/DNA and RR Auction COA.
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