Vibroplex Model X Bug

The Vibroplex Original, introduced in 1905, is still being manufactured. For a few years, 1911 through 1923, the Vibroplex Model X was also sold. I've uploaded a Youtube  video showing the major differences between these two models: For additional information about Vibroplex bugs see: http://www.vibroplex.com/ and Tom French's book, "TheVibroplex Collector's Guide".