This is an early Japanese full coverage helmet. I am not sure of the make , it is not an Arai and does not look like any Shoei I have seen. The stickers inside are the 1970 Snell rating, the Z 90.1 rating and the size M that has Japan in small letters. Old full coverage helmets didn't allow for good peripheral vision. That changed with the Bell Star 120.
The green stripes on it appear to be factory applied. Offset competition stripes look good and never seem to go out of style.
