This is an extremely well preserved example of one of the most iconic vintage amplifiers of all time that comes from the original owner (I bought it in 1987). All parts are original as can be seen in the photos. Of course, all tubes are matched/balanced 12AU7 (X2 6189 VALVO GMB HAMBURG), 12AZ7 (X2 SYLVANIA), and 12BH7 (X2 RCA) and they have no more than 300 hours used. As can be seen in the photos, the amplifier is in pristine condition (9.3/10 cosmetic). I’d say the only flaw worth nothing is about 7 lettering partially erase on the right side of the amplifier and few typical hairy scratches around the speaker terminal strip barrier, very minor, to slight to show up in pictures. Also, if you check carefully at the back of the amplifier, you will see 3 small letters, “JGD” which were the initials of the original owner. Very easy to hide if you wish but to me, it was a kind of gratitude at the original owner who, fortunately for me and you next lucky owner, bought this amplifier in 1963 and babied it. Amplifier works perfectly and is very quite. All tubes as mentioned in the description (see detail pictures). Original owner’s manual. Tube Complement: Voltage Amplifier – One 12AX7 (drives both amps) Phase Inverter – Two 12AU7 Drive Amplifier – Two 12BH7 Cathode Follower Drive – Two 12AT7 or 12AZ7 Output – Four KT88 or 6550. Selectable source input for Stereo, Twin-Amp or Mono operation. Ouput is rated at 75 watts continuous per channel in Stereo or Twin configuration. 150 watts continuous mono. Harmonic Distortion is less than 0.5% at rated output or less for 20Hz through 20kHz. Typical performance is 0.3% or less at 20Hz and 20kHz full power. Typical performance in the mid frequencies is 0.1% or less at full power. Output barrier strips provide taps for speaker impedances of 4, 8 and 16 ohms stereo or 2, 4 and 8 ohms mono. The terminal strips may also be connected for a constant voltage output of 25 volts in either stereo or mono, or for 70.7 volts in mono. The secondary of the McIntosh output transformer may be operated either grounded or not grounded. If grounding is desirable, a wire may be connected between chassis and common of either or both output termnal strips. The item “LEGENDARY MCINTOSH MC275 FROM 1963 ALL ORIGINAL PRISTINE CONDITION” is in sale since Wednesday, March 23, 2016. This item is in the category “Musical Instruments & Gear\Guitars & Basses\Electric”. The seller is “georgejg13″ and is located in Bethlehem, Pennsylvania. This item can be shipped to United States.