Original vintage industrial magazine ad, for CHARLES H. BESLY COMPANY of Chicago, IL. Bestly Taps Are Part of This Picture they Cut Accurate Threads for Mercury Outboard Motors. For close tolerance threading of aluminum outboard motor parts the Kiekhaefer Corporation, Cedarburg, and Fond du Lac, WI. relies on Besly had, high speed machine screw taps to help achieve the power and reliability for which Mercury Motors are world famous.   Old dated 1948 tool industry advertisement.

Approximate size  8 x 11 inches.