This Maccaferri plastic acoustic guitar is no toy. This is the deluxe Arch top model, there was also a cheaper flat top veriosn. In 1953 these sold for $39.95.

Mario Maccaferri considered these Dow-Styron (polystyrene) models the pinnacle of his career, at least according to his 1953 promotional material:

"I consider this guitar the crowning achievement of my entire career! All my life I have been associated with guitar playing and manufacture. My long experience, plus modern engineering techniques and materials, have made this instrument possible today.
The Maccaferri Guitar has been thoroughly tested by many top-ranking guitar players, who agree unanimously, that no finer guitar has ever been produced!"

Link: Maccaferri deluxe archtop guitar for sale online auction April 2010