A good but unsigned example of Dunn’s Model Eye in original case. The model eye has rotating variable aperture with three positions, 5mm, 8mm and 1 cm. Each of the 23 eye conditions are stamped on the rear. Condition is good noting minor scuffing to edges of retinae.
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Fletcher Wallis sells objects and books relating to the history of science, medicine and technology from his unit at Admiral Vernon Arcade Portobello Road. He publishes books through Vernier Press, including Antique Medicine Chests, and Corkscrew Patents from 1795. He has been dealing for thirty five years.