I had it serviced about three years ago. Some of the vacuum tubes have been replaced from the original. I used it a few times a year until about a year ago, but since then it hasn't been used and has been sitting unused, so I'm selling it to declutter. Please refrain from purchasing if you are looking for a pristine appearance, as this is a vintage item. Considering the speaker serial number and other product numbers, I believe this amplifier is from around 1976. The number listed on the amplifier body is A6056⚫︎⚫︎. No claims and no returns. Shipping may be delayed due to work, but I will do my best to provide courteous service. Thank you.