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Howard Hughes Tricone rotary drill bit , (Baker Hughes company 1933/ 1949):
$1081.92
Howard Hughes Tricone rotary drill bit , (Baker Hughes company 1933/ 1949) Houston Texas
One very rare piece of American history , this drill bit revolutionized drilling, incredible history.Has embossed on the side, letter K NN8 . stamped on the rim 3370 K1 A 8 4/?
Measures 6'' x 4'' , weight 3.800gpostage UK only .
