This is the ORIGINAL Marantz amplifier (model 1 was a preamp), produced from 1956-62. 40 W ultralinear, 20 watt triode. For specs and history. I bought them from a friend and daughter of the original owner about 15 years ago. They had been sitting in her basement since her father’s death some years prior. They had been in the house her entire upbringing. When I bought them, I was told by many people that if I wanted to “flip” them, that I should sell them as-is; but if I wanted to use them that it was imperative to have the components thoroughly tested and refurbished as needed. I very much wanted to used them, and so I had both amps were refurbished by Mike Samra in 2008. I have enjoyed them ever since. I just had them inspected by Benny Amina at Amina Audio in May 2023. I can provide additional photos for serious buyers.