Original Russian Soviet 3-bolt Diving Helmet (not polished, original patina). This helmet produced at the 28 Soviet Military Factory.Type of suite 3-bolt for depth 60 meters. 1984, serial number - 5892. The item "Vintage Maritime Russian 3 Bolt Deep Sea Diving Helmet Authentic Original" is in sale since Thursday, September 17, 2020. This item is in the category "Antiques\Maritime\Diving Helmets". The seller is "sikhote-master" and is located in Mocow. This item can be shipped worldwide.