Japanese Helmet Shell with Thai Rework?

[mikie]

I've had my one and only Japanese helmet shell for 20 years or so.  It was only much later that I learned that all the extra holes in the shell indicate that it was a wartime Japanese shell used post-war by the Thai military.  Thought I'd get some expert opinions here, and also document it for future reference.  I can't find any trace of markings inside the shell.   Any and all comments, opinions, and advice on possible restoration efforts are welcome.  Thanks.

 

Mikie  

[Fortunes Of War]

Wow!  It looks like literally every rivet was removed from the helmet.  I can't say that was done in the Thai re-working process because I just don't know.  It's also minus the chin strap rings that you normally see in a Thai re-worked helmet.