The J-38 telegraph keys were manufactured between WWI and the Korean War by multiple different companies. One of the better known such companies was the Lionel Corporation, still making toy trains. A lesser known company was the Liberty Elec. Corp., which made the key now at auction. Please note that the rectangular base is missing. Included in the auction is a page describing the history of the J-38.
Buyer pays $6.35 for shipping via the USPS. No sales beyond the US.