Japanese antique hat (cap) Military forces
World War I - World War II

• Hat (cap) of military forces
• I think that it is an air force of former Japan force-affiliated hat.
• I suppose it whether it is the hat which the person who flew ZERO airplanes put on.
• A character was written to the inside of a hat, but was not almost readable.
  Only the number written as 217 was readable.
• Size : About 32.0 (cm) - 24.0 (cm)
  ( 12.59 (inch) - 9.64 (inch) )

Details : here.

Walk-Market JAPAN

postscript (^^)/
Please teach if there is a commodity
of Japan that you request. It refers.
Please write in the comment. Thank you !