||The familiar, simple round or oval specula were not developed until the 19th century.
Newberg in 1827 published an article on perforation of the tympanic membrane in which he recommended examining the ear by means of a slender horn tube nearly 10 cm long, with a bell mouth.
This instrument was too long to be of practical use but seems to be the origin of the, different varieties of tubular specula which subsequently evolved.
Dr Ignaz Gruber of Vienna improved upon Newberg's original idea; Gruber's specula are still in use today.
(from Charles H. Burnett 1884 The ear: Its anatomy physiology and diseases. A practical treatise).