Oboe. Ebonite body. Metal keys with cork pads. Barret Action key system. No inscriptions are discernable.
The key system on this instrument was developed by Apollon-Marie-Rose Barret, a French oboe player who worked in London from the 1830s to the 1870s. Barret was hugely influential both as a performer and as a teacher. His key system was based on an earlier French model but with some significant alterations. In the late 19th century it became the standard in Britain.