Original U.S. WWII Navy Aircraft Breathing Apparatus "Blimp Rebreather" Hand Select:Yes each map has a sewn

each map has a sewn selvage hem around all four sides to prevent fraying

In the correct black finish each tube bears replicated WWII Maker's code and date for added authenticity

chinstrap rivets located higher up on the steel shell and variations in locations of markings among others

They will not work with any of the current production semi-auto Thompson guns made by Auto-Ordnance or Kahr Arms

Condition is fair to good

Original U.S. WWII Navy Aircraft Breathing Apparatus "Blimp Rebreather" Hand Select:Yes each map has a sewnOriginal Item: Developed in late 1930's by Mine Safety Appliance (MSA), these oxygen regenerating systems provided dirigible aviators with necessary flow of oxygen at higher altitudes. Used with USN C type breathing mask (not included). Chemical cylinder not included. This is a fascinating piece of history, high altitude bombing in late WWI with German zeppelins and allied blimps lead to the discovery that maintaining ships higher than 16,000 feet for