Pretty rare Telefunken ELA M 251 with AC701 tube. I bought it new(first and only owner) in 2012 And only used it in my home studio, recording a bit of acoustic guitars and vocals, barely, for the music of a TV serie and it was only on for about a maximum of 100 hours during that year and then I barely used it and was always taken care of and disposed in a room at 45 to 50% humidity. I used it for maybe 20 hours this year for recording the vocal of a client and that’s it. It’s like new for the rest. You know where to find the info I won’t bother telling you how great that Mike is it‘s a real icon.