We have always considered and collected these commercial masks and helmets as industries tribal art. Examples can be elegant in their simplicity or bazaar and complex. They are always unique, suprising and filled with personality.
E. Thacher Cylindrical Slide Rule – With Original Case – Circa 1880s
A true monument to 19th-century engineering, this E. Thacher Cylindrical Slide Rule compresses over 40 feet of logarithmic scale into a beautifully machined rotating brass drum, designed for high-precision calculations long before the age of digital computing. Manufactured by Keuffel & Esser, this example shows its age with mellowed paper scales, gentle oxidation to the brass and steel framework, and a warm aged patina throughout. Still complete and solid, it comes housed in its original dovetailed hardwood case, scuffed and scratched as expected, but fully intact and functional. A classic piece of analog computing history, ready for display. $650
