This is a retired TK-4A used by. The big glass shade outside was torn down. The electric wires, sealed rubber, and oxygen mask are in good conditions. Can prevent you from strong sunlight. The outer shell is made of glass fibers, light but strong. A good item for your collection.
This item is in the category "Collectibles\Militaria\Current Militaria (2001-Now)\Original Items\Hats & Helmets". The seller is "felicia567" and is located in this country: CN.