Ophthalmic instrument set, very nearly complete, all metal instruments, in mahogany case, by Collin of Paris, early 20th century, from Charriere collection Ophthalmic instrument set 1901-1930
Burkhardt-Merian's set of ear instruments, complete, plated metal, in leather case, by Krohne and Sesemann, London, 1890-1910 Burkhardt-Merian's set of ear instruments 1890-1910