I purchased these from Colterphoto a while back and cleaned them up a bit. These have been sanded, and painted. They will show their "battlescars" upon close inspection as i didn't want to erase all their history. I believe they are 1976 issue, not matching serials. I have built new AA networks with solen caps, PE brand inductors and BEC 3636 transformers. They are wired and ready for tri-amp or bi-amp if you so choose. They have brand new woofers, and tweeters. The k55's are original and work great. $800 I do not want to ship. local pickup or i can possibly meet in or around central Indiana.