Early pair of prototype MK IV mirror finished stainless steel chassis that were punched in error with 1.25″ diameter tube socket holes instead of the standard Dynaco 1.125″ holes. Fortunately this is a common socket size and I have included all these sockets with both chassis. I should also note that there is no silk screening on either chassis and there are a few light surface scratches that are barely visible…..otherwise both these pieces are perfect. Included this purchase will be new bottom covers and original style rubber feet. These will be sold as a “Pair” only and not individually.