This helmet is in mint condition with a batch number of 2595, but do not see any other stampings on it. No size marks on the metal and he liner is marked 54. The condition is stupendous. Has the origin chinstrap which shows minimal wear. The coolest part of the helmet is the original blue canvas Luftwaffe strapping which was used to put camo foliage on helmet. Came directly from vets son and is one of the prettiest helmets around.