A Catalog of Horseshoe Brand Brushes : 1924 (1924)
Pittsburgh Plate Glass Co. · leaf 43
PITTSBURGH PLATE GLASS CO. COLOR BRUSHES EXTRA EXTRA SUPERIOR CAMEL HAIR Pure Siberian Squirrel Hair, Square Top, Cement Set, Nickel Bound, … binder is added, pure Camel Hair brushes will be fou ml too soft, inelastic. The M Japan color described on page 4J is recommended for such service. I 42 ]
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