Vintage 1920's Dill Mfg. Co. Cleveland OH Tire Valve Stem For Sale

A Vintage 1920'sDill "Instanton" Dust-and-Valve Capengraved with on the side "The Dill Mfg. Co." "Cleveland" and a patent date of "July 13, 1915". Part of my late grandfather's extensive antique automobile and parts collection. The valve cap does not have an internal nut. Commonly used on Model “T” Fords and other vintage automobiles. Thanks for Looking!!!Product Details & Purpose

• Manufacturer: Produced by theDill Manufacturing Companybased in Cleveland, Ohio.
• Function: These were specialized, quick-release metal caps designed for vintage automotive and bicycle tire valve stems.
• Mechanism: Unlike standard threaded caps that require multiple turns to remove, the "Instanton" mechanism allowed the user to slide or twist the capon or off in a winkto quickly check or inflate tire pressure.