By William R. Holly K1BH.
A beautiful retrospective on one hundred years of the oldest name in amateur radio. Here is the story of a company whose name has come to be synonymous with the all-mechanical speed key or bug. The collector and historian will find this book useful for identifying and dating Vibroplex keys, as it has pictures and characteristics of all known models. Full of photos and advertisements. ©1990 Vibroplex 91 pages.