This item is a vintage dental or veterinary aspirating syringe, likely manufactured by Cook Laboratories or designed in the “Cook-Waite” style. Usage: Historically used to inject local anesthetic from a carpule during surgical dental or veterinary procedures. Design: Features stainless steel construction, sometimes chrome-plated, with a thumb ring and finger rests for grips. Collectibility: Often sought after as a historical medical or dental collectible.