WW2 US Army M1 Helmet, Early Production, Vietnam War Style, World War II

This is an M1 helmet, believed to have been manufactured during the WWII era. The chin strap hook is not spherical, and the inner tape is made of herringbone twill fabric. There is a repair on the tape directly in the front.
The liner has been painted white. The intention behind this is completely unknown.
The helmet band is from the 1980s.
Sold separately is possible.
Thank you.