I've been sort of looking for a Magnavox portable to replace one that my parents dumped in my absence. It was an early transistorized unit dating from around 1965, off-white wrinkled vinyl cover, with swing-out speakers on the sides that detached. The center section contained the drop-down changer, ...

I've been told that Zenith's Cobra and Cobra-Matic series of changers were made by Seeburg.