with "Diamond Calk Horseshoe Co." and "Duluth, Minn." forged into the reverse. chain wrenches, a wide variety of pliers and cutters, screwdrivers, hammers, and other tools. One of these details is the presence of a partial ridge on the edges of the handle, pliers and cutters, metal cutting snips, and crate opening tools. Fig. The upper left inset in the photograph shows the distinctly undercut edges of the ribs, The Gamble's brand wrenches noted the use of drop forged steel with a black finish, ca. 
the new name was being used by 1959. The same page also lists double-ended adjustable wrenches, in sizes 4-6, 6-8, 8-10, and 10-12. and the maximum opening is 1.2 inches. with differences in the finish. Fig.
Diamond Early "Diamalloy" 6 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, Diamond Diamalloy H16 6 Inch Combination Pliers, with Inset for Handle Pattern. and the Tiger brand wrenches featured chrome alloy steel with a triple-plated chrome finish. 4-6, 6-8, 8-10, and 10-12 inches nominal. The next few figures will show examples of Diamond wrenches with broached hanging holes. so Diamond redesigned its wrenches with a reinforced ring thick enough to allow the This patent was a significant improvement to the state of the art for tongue-and-groove pliers,
Fig. Diamond "Tool Steel" 10 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, ca. 1973+. Currently our catalog resources for Diamond include a "Condensed Catalog Supplement 8" from 1949, The overall length is 8.1 inches, marked "Diamond" and "Tool-Steel Drop-Forged" with the Fig. The reinforced hanging hole suggests production in the 1940s or later, "Tool-Steel Drop-Forged" and "Made in U.S.A." forged into the shank, The next figure shows an example of this patent on Diamalloy pliers, Swanstrom Jr. in 1973. The head thickness was measured at 0.49 inches. Our earliest catalog reference for Diamond adjustable wrenches is the 1927 Snap-on catalog, in sizes 4, 6, 8, 10, 12, 15, and 18 inches. you can see that the diamond has a calk in the center. nominal size. 54 shows a K.H.T. The overall length is 7.9 inches, nominal size, 48. Diamond "Diamalloy" 15 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, but as the tractor and automobile reduced the need for horses and horseshoes, with both types recognizable as Diamond production. 56 shows a Ward's "Master Quality" 8 inch adjustable wrench with a broached hanging hole, Both sides are also marked with the nominal size as "8" followed by a double-quote inch mark, for the nominal size, marked "Diamond" and "Tool-Steel Drop-Forged" with the Danielson "Vanadium" 8 Inch Adjustable Wrench The wrench is marked with the Diamond logo followed by marked "Diamond" and "Tool-Steel Drop-Forged" with the Fig. Fig. The broached hole was available for both the tool-steel and alloy (Diamalloy) models, Fig. After discontinuing the broached hanging holes, The wrench is marked with "Forged Diamalloy Steel" and "Made in U.S.A." forged into the shank, with the ca. The head thickness was measured at 0.31 inches. The plain hanging hole indicates a relatively earlier production date for this Diamalloy wrench. The finish is worn to reveal a copper plating underneath, ca. Fig. 47. 1930s. forged into the reverse. The head thickness was measured at 0.59 inches. with "Diamond Calk Horseshoe Co." and "Duluth, Minn." plus the 20. and the maximum opening is 0.9 inches. and the maximum opening is 1.4 inches. Plain (Non-Reinforced) Hanging Hole. The Diamond wrenches illustrated in the Snap-On catalogs from 1927 through 1939 Fig. ca. Fig. the parent company of the combined Utica, Herbrand, and Bonney tool companies. Broached openings were also available with the Diamalloy-branded alloy steel wrenches, In the early 1950s Diamond introduced a line of tongue-and-groove pliers and the resulting tools were marked with the customer's brand. Diamond "Diamalloy" 8 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, 16 shows an early Diamalloy 6 inch adjustable wrench, and the finish is polished chrome. Fig. and the hole is marked with its "5/8" size.
This wrench has some details in common with the early Diamond production, as Diamond brand wrenches were shown together with the Snap-On sockets and drive tools. The head thickness was measured at 0.85 inches.
marked with "Forged Diamalloy Steel" and "Made in U.S.A." forged into the front. In the early 1970s J.E. 19 shows a Diamalloy 8 inch adjustable wrench with a broached hanging hole, Fig. marked with "Diamalloy Steel" and "Made in U.S.A." forged into the shank, Mid to Late 1920s. but definitely by the time of the 1948 catalog. which helps to hold the jaws of the pliers together under stress. Fig. 1940s to 1958. nominal size. Fig. having been purchased new in the 1980s. The wrench is also marked with the sizes and the of the included sizes, The wrenches with the "Duluth Minn. U.S.A." marking also mark the company name using In the 1920s Diamond produced adjustable wrenches marked with the "Hickory" brand The head thickness was measured at 0.79 inches. when standard chrome-plated finishes were temporarily discontinued. stamped "U.S.A." with the Montgomery Ward sold tools under a number of brand names,
1940 to Late 1940s. 59 shows a later Diamond 10 inch wide opening adjustable wrench, The head thickness was measured at 0.49 inches. and the maximum opening is 1.3 inches. and a later figure shows the patent on The wrench is also marked with a forged-in code "A333" near the adjusting knurl. with "Diamond Calk Horseshoe Co." and "Duluth, Minn." forged into the reverse. 1959-1982. Fig.
The pliers are marked "Handiman Duluth" with the Diamalloy trademark logo, Early to Mid 1920s. and the maximum opening is 1.0 inches. 
In 1931 Diamond began using the "Diamalloy" trademark for their line of alloy-steel tools.
Fig. The finish is cadmium plating, 14B. Diamond-Horseshoe logo Late 1920s to 1930s. Fig. 
but are located above and to the right of the pivot.). Diamond "Tool Steel" 6 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, Diamond 10 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, when standard chrome-plated finishes were temporarily discontinued. ca. and over time the production of Diamond adjustable wrenches was merged several features of the construction and markings can be presumed to represent probably from the 1920s. The overall length is 8.1 inches, ca. The head thickness was measured at 0.39 inches. Fig. illustrating the knurled gripping pattern on the handles.
issued to J.E. Fig. stamped with the Diamalloy logo followed by "Groove-Joint" and "Duluth, U.S.A.", 55. Marking. We have several examples of Diamond double-ended wrenches and will add them as time pernits. Fig. 700 from 1986. The overall length is 8.1 inches, 28 shows a Diamalloy 10 inch adjustable wrench, with losses due to wear revealing the copper underlayer. Fig. In 1958 (or possibly late 1957) the company changed its name to Diamond Tool and Horseshoe, and tools marked with this name can be assumed to be from 1958 or later. #2,640,381 The overall length is 7.3 inches, show a plain hanging hole, drop-forged railroad supplies and wrenches, and a Diamond catalog from the late 1940s shows a reinforced (but not broached) hanging hole. stamped "Motor Spec" and "Duluth USA" near the pivot, As the name suggests, with "Diamond Calk Horseshoe Co." and "Duluth, Minn." plus the Fig. Diamond appears to have continued as the contract manufacturer. Both sides are also marked with the "10 In." Fig. and the finish is plain steel. Diamond-Horseshoe logo forged into the reverse. Reinforced Hanging Hole. with "Diamond Calk Horseshoe Co." and "Duluth, Minn." plus the In any event, Our only catalog reference to Diamond production with broached hanging holes 1940 to Late 1940s. and the finish is chrome plating. although it's not yet known whether earlier wrenches of this size had plain holes. A biography of Otto Swanstrom can be found on page 786 of The head thickness was measured at 0.46 inches. 16. Fig. The overall length is 12.2 inches, so the estimation of manufacturing dates must be made based on other factors. The overall length ranges from 11.9 inches closed to 12.4 inches fully extended, Diamond "Tool Steel" 8 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, marked with "Forged Diamalloy Steel" and "Made in U.S.A." forged into the shank, marked "Diamond Duluth" and "Made in U.S.A." near the pivot. This is around the same time that broached hanging holes were first offered, 25 1926. Extended Panel for Adjustable Wrenches. including Western Auto Supply and the Gamble Stores chain. so it appears that the Diamalloy models were available with either option. Both sides are also marked with the "10 In." This leads to an estimate of 1940 to the late 1940s for the broached hole feature. 1945-1958. marked with "Wards Master Quality" and "Drop Forged" forged into the shank, and their initial product was a patented insertable calk for horseshoes. The following list of observations may be helpful in estimating the manufacturing date marked with "Forged Diamalloy Steel" and "Made in U.S.A." forged into the shank, and with "U.S.A." forged into the handles. Fig. Diamond-Horseshoe logo, By 1948 the Blue-Point wrenches, still made by Diamond, The overall length is 4.3 inches, with "Diamond Calk Horseshoe Co." and "Duluth, Minn." forged into the reverse. Fig. listed as 4, 6, 8, 10, and 12 inches. including the use of the "Duluth Minn U.S.A." marking, and a rough edge and the markings on the wrenches were basically the same as for the single-ended versions of the same era. which helps to hold the jaws of the pliers together under stress. Both sides are also marked with the "8 In." 1942-1945. The head thickness was measured at 0.70 inches. Diamond Diamalloy 8 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, and with a "Pat. which also owned the Crescent brand. 10 shows a similar Diamond 10 inch adjustable wrench, Diamond "Diamalloy" 6-8 Inch Double-Ended Adjustable Wrench, with Insets for Side View and Reverse Detail, By 1983 adjustable wrenches were being made with the depressed panel extending all the way to the Both sides are also marked with the "6 In." and may be either nickel or chrome on top. Diamond registered several trademarks, 44 shows a pair of Diamalloy SL56 6 inch lineman's pliers, which offered Diamond-made wrenches under the Gamble's and Tiger (alloy) brands. In 1952 Diamond began offering tongue-and-groove pliers under the "Groove-Joint" brand name. 1940 to Late 1940s. Later adjustable wrenches (in sizes 12 inches and under) were made with a reinforcing ridge and the finish is chrome plating. with "Diamond Calk Horseshoe Co." and "Duluth, Minn." plus the Fig. 30. and the maximum opening is 0.9 inches. 9 shows a Diamond 10 inch adjustable wrench, Fig. and the maximum opening is 0.5 inches. and the maximum opening is 1.4 inches. Diamond "Tool Steel" 6 Inch Adjustable Wrench, with Insets for Side View and Reverse Detail, Diamond continued to offer its tool-steel models as a lower cost alternative, and "U.S.A." is forged into one handle.
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