S. W. Card Mfg. Co., was one of New England's most important late classic period manufacturer's of taps, dies and related cutting tools. DATM (1999) lists S. W. Card Mfg. Co., which was located in Mansfield, MA, as operating between 1874 - 1908 before being bought out by the Union Twist Drill Co. of Athol, MA.
The company began in 1874 as Card Company, a partnership
of Simon W. Card and David E. Harding. In 1894, it became a corporation
known as the S.W. Card Manufacturing Company. Simon Card died in
1899. In 1913, the company became a division of Union Twist Drill.
(Copeland, pg. 117-118).
References
(1928). S. W. Card Mfg. Co. Division Union Twist Drill Company,
catalog 32. Mansfield, MA.
Copeland, Jennie F. (1936). Every day but Sunday: The romantic age of New England Industry.
Union Twist Drill Co. (1912). Catalog No. 100. milling and high power cutters: High speed steel.
Union Twist Drill Co. (1939). Catalog N: Union Twist Drill Company, Athol, Massachusetts, U.S.A. manufacturers of milling cutters, gear cutters, twist drills, hobs, reamers, machine tools.
