You are bidding on a large Knight tube amplifier - probably from the 1950s. It's a model 93 SZ 682 and it uses two 6L6 output tubes and is in clean condition. The other tubes used it this set are three 6SC7 and a 5U4 rectifier. The amp has been serviced in the past - filter caps and coupling caps replaced and done nicely. I have tested the amplifier on the microphone setting and it works very well. The power cord looks to be original and the plug end is da...maged and not safe and will need to be replaced/should be replaced with a grounded three prong cord. Very retro looking tube amp in very nice shape, hard to find in this condition. Tubes pictured are the tubes included with the amp. They have been tested and are good. Shipping, packing and insurance on this amplifier is $48 It is large and heavy and will need proper packing. I ship via UPS or Fed Ex Ground only. All sales are final - absolutely no refunds or returns accepted, know what you are buying, pictures are part of the description. NO guarantees on items of this age and nature. Items are shipped once per week on Saturday only. Thanks for looking.