Very rare 1953 Porsche-factory-produced booklet to promote the company's then-unique synchromesh system. Handmade, with tipped-in original photo prints and hand-written text! Plain maroon leatherette cover (not shown); photos here are first two pages. "Spicer" stamp inside (British transmission maker). Hardbound, 9x9", 12 pages, heavy paper, my personal copy.
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