C.G. Conn 88hsgxcl (B.A.C. Custom) with F Attachment. I bought this trombone in 2008 when I was stationed in Mannheim Germany as an Army Trombonist. It has been professionally kept ever since. The SGX is a gold and silver package that features a solid sterling silver bell and gold plated accents. This particular trombone is 1 of 1 and is the only one in the world of its kind because in 2017 when I was stationed at Fort Riley Kansas, I took it over to Mike and the B.A.C. Factory to have them overhaul it using their artistic signatures. I had them do a satin finish on all of the silver parts and leave the gold shiny. They put their signature loop in the tuning slide. They also completely rebuilt the hand slide with their signature ergonomic design. It plays wonderfully and the hand slide is in perfect working condition.