Who makes a Stereo listening chair

Roughly 25 years ago (mid 70's) I sat inside and listened to stereo in an egg-shaped chair which had good quality speakers built into the padding at about ear height. This thing was said to have been built for a World's Fair exhibition. Sound was much better than you might expect because it approached headset control of ambience but with better physical comfort and larger drivers. When I say egg-shaped, I mean the chair was molded fibreglass, roughly 4' tall, ovoid, maybe 30 to 36" in midsection diameter. You entered it through an oval cutout in the front.

Anybody know what the chair was correctly called, or where I might find it or a similar item?