Imperial Japanese Navy Barrack Cap, Unmarked A rare pattern with reinforced parts on the ventilation holes. When I, who wears a size 60 hat, try it on, it barely fits. I own a barrack cap from Nakata Shoten, but the presence of a real one is impressive just by displaying it. I believe this is likely an unused item that has survived, but I ask for transactions with those who understand antiques. If a transaction is not completed by the end of the year, I will dispose of it.