For sale is a used 1987 Ampeg SVT HD Limited Edition Skunkworks Bass Head #458 Of 500. In 1986, St. Louis Music acquired the rights to the Ampeg name and took possession of all remaining MTI inventory, which contained enough original components to build 500 amps. These 1987 Limited Edition SVTs were built in the U.S. by SLM's own Skunk Works crew, and each included an engraved panel indicating the unit's number within the production of 500 total units. This amp has been played, does have some wear, but is in perfect working order. There are some nicks in the tolex, some marker on the panel, and a couple replaced knobs. Other then the tubes and a couple replaced knobs, everything is original. The tubes are 6550's and have plenty of life left in them.