![Image 566 of Dun and Bradstreet Reference Book: September, 1909; Vol. 166, part 2 | Library of Congress Image 566 of Dun and Bradstreet Reference Book: September, 1909; Vol. 166, part 2 | Library of Congress](http://tile.loc.gov/image-services/iiif/service:stb:stbdandb:sep1909v166p2:0566/full/pct:50/0/default.jpg)
Image 566 of Dun and Bradstreet Reference Book: September, 1909; Vol. 166, part 2 | Library of Congress
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![Image 298 of Dun and Bradstreet Reference Book: March , 1910; Vol. 168, part 1 | Library of Congress Image 298 of Dun and Bradstreet Reference Book: March , 1910; Vol. 168, part 1 | Library of Congress](http://tile.loc.gov/image-services/iiif/service:stb:stbdandb:mar1910v168p1:0298/full/pct:25/0/default.jpg)
Image 298 of Dun and Bradstreet Reference Book: March , 1910; Vol. 168, part 1 | Library of Congress
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Amazon.com: Aceteel ACME 1/2-12 Trapezoidal Tap, ACME 1/2"-12 HSS Trapezoidal Thread Tap Left Hand : Industrial & Scientific
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