Handheld stereoscopic slide viewers sold as a unit with discs specially adapted for stereoscopic slide viewers carrying a number of stereoscopic pairs of transparencies in the nature of stereo cards

handheld stereoscopic slide viewers and discs specially adapted for stereoscopic slide viewers carrying a number of stereoscopic pairs of transparencies

Handheld stereoscopic slide viewers sold as a unit with discs specially adapted for stereoscopic slide viewers carrying a number of stereoscopic pairs of transparencies in the nature of stereo cards