Signed book: The Double Helix. First edition, first printing. NY: Antheneum, 1968. Hardcover with dustjacket, 5.75 x 8.75, 226 pages. Signed in blue ink in Watson’s diminutive script on the second free end page. In fine condition, with owners stamp to first free end page, light wear to the spine, and a bit of light wear and toning to dustjacket. Pre-certified PSA/DNA and RRAuction COA.