I got it yesterday. It is a Yamaha SHB400 made in Japan between about 1981 and 1985. It plays especially well and sounds good too. I found out today that the tone knob has a coil split switch built into it. It looks just like this one.
I also got this here Electro Harmonix Frequency Analyzer.
I got both of them from Atomic Music in Beltsville, Maryland.