An extremely rare original cast iron Willoughby stopple with raised lettering. Tiny size with the bottom plate measuring about 1-3/4 inches in diameter, and the original gasket measuring 2 inches across. Untouched condition and in full working order. One of two known examples in this size. Fits several early jars such as a quart or pint THE LADIES FAVORITE, pint Wm H HALLER, pint BALTIMORE GLASS WORKS, and many early unmarked stopper jars.