Undoubtedly the most popular side-to-side mechanical Morse keys is the semi-automatic key or "bug", Most popular brand was Vibroplex key, after the company that first manufactured them in 1905.
Most popular brand was undoubtedly the most popular side-to-side or "bug". Mechanical Morse keys is the semi-automatic key side. Most popular brand was Vibroplex key. This was after the company. This company first manufactured them in 1905.