Twin lens viewer for lantern slides, reputedly designed by Birt Acres. Regd No. 188884. With two prismatic lenses and a two position slide carried ( ? Later ? Tufnol). With a ground glass screen. Adams and Co. 81 Aldersgate St, EC and 26 Charing Cross Rd, London. Overall: 242 mm x 150 mm x 178 mm. Adams lantern slide viewer c. 1890