Vintage 70s Fender USA Mustang Duo Sonic Hard Case Fender This is a genuine hard case from the late 70s, featuring the Fender logo and an orange interior, MADE IN U.S.A. I obtained this case separately, but it appears it originally came with a vintage Duo Sonic. (See image) Of course, it's also the perfect size for a Mustang. It's USED. The handle and latches are in good working order, and the exterior and interior appear clean. Overall, it's a high-quality vintage case. Vintage cases for Duo Sonics and Mustangs are difficult to find on their own, so how about it if you're looking for one?