First seen in third season episode Pax Romana, where it contains the cure to Helen Magnus' radiation poisoning, this retro-futuristic syringe is seen again in fourth season episode Tempus, where Adam Worth, intent on changing the past, uses one in Victorian London to administer a cure for leukemia to his daughter Imogene.
Two-part spring-loaded machined brass device with acrylic tip. No additional mechanism or electronics.
From Legends Memorabilia.