Antique Glass Syringe with Black Collar and Wound-Thread Piston, 19th Century Medical Syringe

A glass-barrelled medical syringe with a blackened ferrule at the mouth and a plain drawn glass tip, the piston packed with wound thread. Before rubber washers came into use the glass piston was wrapped with thread to seal it against the barrel, and the packing was renewed by the physician as it wore. The tapered barrel has lovely light and age.