That a 20" or 14" tube? Difficult to tell from the back! 8 pin minineck tube so if you've not got a chassis for it you'll want a WG K7000 or Hanty with the 8 pin neckboard. A Hanty with the 8 pin neckboard socket is rarer than the K7000 unless you go with a Polo 2 or Polo 3 chassis. I don't think i've ever seen anything pre-Polo chassis with an 8 pin neckboard socket apart from the 10 inch MTC900, MTC900/E and MTC9000 versions.