Helmet Translation and Maker Identification

Hello, I’ve had this helmet for about 12-13 years and I’ve never known what the four characters on the inside front rim said, can someone please help? The top two pictures are the same, just inverted since I don’t know which way to read it.

Also I can’t seem to find a real maker’s mark on the other end, just an incomplete triangle and the number 1. Any assistance with that would be appreciated as well.

Thanks in advance,

Kevin Robinson
Greenville, SC USA

1158740

1158742

1158746


Click to enlarge the picture


 


 


 


 

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