This helmet has the batch number and size stamped on the rear but it is very light and hard to make out. It looks like it is stamped a size 62 and has a batch number of 2524. The SS decal is present, but shows wear and scuffs which is pictured. It comes with the original liner which is marked a size 55 and it also has about half of the original chinstrap. Overall it is still a very nice helmet with a weathered and used look.