The Magnatone brand is better known for its amplifiers, but they also produced guitars in the 1950s and 1960s. The coolest of these are the Mark series (Mark III to Mark V), produced in small numbers from around 1956 to 1958. The top of the range was the Mark V, designed by Paul Bigsby and featuring his famous vibrato unit. The Mark V also had a semi-hollow body and a though neck.
This one was advertised is for sale on eBay USA in 2010 for $8,900.