A Catalog of Horseshoe Brand Brushes : 1924 (1924)
Pittsburgh Plate Glass Co. · leaf 14
HORS E S H O E BRAND BRUSHES FLAT VARNISH BRUSHES … NO TE— The Flat l aniish brushes listed on the following pages are all full width, measuring to the inside of the ferrule. As the old designations, single, double, triple thick, etc., do not give a true idea of the thickness of the brush, there being no standard of thickness in the brush…
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