This is a Llaves Telegraficas Artenasas (LTA) key. I purchased it a couple years ago and just decided to put it in operation. The inscriptions are WiMo and 0022. Gold plated brass. Any sharp of eye key afficionados out there?
BINGO! Give that man a cigar! Not only are they counter sunk, they are not well insulated. It could be wired to the post in front but would be an absolute mess of wiring in the way of everything. There are normally three post on this type of key to attatch the wiring. Anyone want a paper weight?