Badge / Brooch, TC11, Surgeon, Stacked Gears (40mm dia approx)
This series of designs feature 2 Gears which are stacked in a selection of bronze and silver coloured arrangements - see picture.
The central design of the badge is a silver finish cadusceus* and hacksaw to represent surgery and those in volved in the theatre that you'd rather not visit.
Note that the dimension stated does not include any overhang from the face design and is the size of the largest gear making up the base of the backing.
*Caduceus. Not Rod of Ascleplious which has 1 serpent. But if it's good enough for the US Army it'll have to be good enough for us too!