Edinburgh Mystery Object

(from Surgeons’ Hall Museum, Edinburgh)

One of the earliest published descriptions of this instrument (possibly the earliest),  was by a famous Scottish surgeon-anatomist who collected examples from other surgeons and made modifications.

What is the instrument called, what was it used for and who was the surgeon ?

Clue – his portrait hangs in  Surgeons’ Hall, Edinburgh, venue of the BSHM September Congress

submitted by Iain Macintyre