10's WW1 U.S.ARMY DENIM HAT Blue Heather Indigo Denim 6-Panel Hat Purchased at a vintage clothing store in Tokyo a few years ago. I was carefully explained the unique texture of the heather denim and the differences from the 30s US ARMY M-37 denim hat, and I bought it at the time. However, it's difficult for me as a novice now, and I haven't had many opportunities to wear it, so I'm putting it up for sale. They said that denim hats from this era are becoming hard to find regardless of condition or size, and are very valuable. Size Inner circumference: Approximately 57.5 cm Please understand that there may be some errors due to amateur measurements. Condition: USED The fabric is sturdy for its age. There are oil stains, but they are not so noticeable as to make it look dirty. I would appreciate it if you could judge the condition from the images. Please understand that this is a vintage item from over 100 years ago, and refrain from purchasing if you are sensitive to such things. Please consider.