Dominique,   You are safe to call this one WWII vintage.   Allan

*sigh* another helmet ruined by a "heat lot archeologist...."   Obviously real. Obviously repainted over it's life, and sadly it was named too.   Now forever wrecked.

Thank you Allan . Ay time frame ? All te best, Dominique 

Thank you very much and would this be McCord 

Need to see a better shot of the crimp marks at the front seam. If they are oval in shape, its a McCord made helmet. If they are round circles, its made by Schluter. Never scrape away the paint trying to read heat numbers.  They are not that important and removing the paint over the heat numbers lessens the value of the helmet to collectors.  

Thankyou, much appreciated

Can someone please tell me the date, manufacturer and if it is real judging by the heat stamp number it appears to be 10(space)0H so 10 0H is the heat stamp

The key is the reverse threading.  Should be flat white “cotton”.   This example  has silvery thin translucent synthetic thread. It takes time to learn this. Best to compare patches in hand.   A black light can be very beneficial.   Synthetic threads  glow.  Also, note the poorly trimmed khaki edging with loose threads. A WW2 era patch will not have this.  

Continuing with the "1st's"