Found this glass mushroom thing in a velvet-lined box at an estate sale. It has a metal connector at the bottom. Looks like part of a machine?

on the metal connector or glass surface. These can provide clues about the electrode’s origin and age.
Online reference groups and forums dedicated to antique medical devices can be invaluable resources. Engaging with a community of collectors can help verify the authenticity and history of the item. Sharing photographs and descriptions can also assist in identifying the electrode’s specific model and manufacturer.
10. Display or Dispose? Ethical and Practical Ways to Handle the Artifact
Deciding whether to display or dispose of a vintage violet ray electrode depends on personal interest