Designed by John Vassos for RCA (Radio Corporation of America) circa 1935 the Model K was relatively lightweight, being made out of aluminum, and the suitcase-style design featured its own speaker, a classy and reflective protective plate, and pockets inside the lid to carry records.
Note the little design touches such as the tabs for the record slots, and the rounded cutouts (behind the metal plate) so you could easily get to the records themselves. The semi-domed, built-in speaker at the front of the case is a nice design touch.
Today, aluminum is taken for granted as a lightweight, inexpensive material that has many applications However, is was only in 1886 that an American, Charles Martin Halm discovered the process that made commercial production possible. Over the next forty years, aluminum evolved from a laboratory curiosity to an industrial staple
Photographed in the Brooklyn Museum.