" Crankshaft Drill For Cranial Trepanation"
Signed COLLIN, 19th century (around 1890), nickel-plated and gilded steel. Pyramid trephine (or crankshaft perforator) made by Collin, fully unscrewable, round handle with baluster foot, accompanied by a cylindrical crown fitted with 2 lateral clearance holes and a depth limiting ring blocked by a violin key screw. The barrel extends at the front by a square-section rod (here interchangeable) bearing on one of the faces 9 positioning holes and ending with a centering point. On this rod is fixed the trephine (crown) to cut the skull bone in a circular manner. Very good condition. 
Le Magazine de PROANTIC
TRÉSORS Magazine
Rivista Artiquariato
