Now the helmet is painted I wanted to complete it with a liner. I considered buying an old original liner but these are hard to find and very expensive. Besides that, I have done so much work on the helmet I no longer see it as completely original and I think it's better to use old original liners on helmets that are not worked on so much. So I spent time looking around on the internet. The first thing I needed to do was to learn about German Helmet liners. I found a lot of information the internet like on my favorite website World War Helmets http://world-war-helmets.com/home.php I found a reproduction liner at a militaria website that ordered together with 3 rivets. After installation of the liner, it was found a little too small:
This picture shows the markings on the liner: The measurements of this reproduction liner are: 62cm and between the front holes 14cm.
I wasn't really happy with this liner so I spent more time studying liners. Some measurements on my helmet: The outside measures 65,5cm, the distance between the front holes is 17cm. The inside is not easy to measure but is between 63 and 64 cm. So this is a size 64 helmet. So dispite the markings 64nA/56 on the liner, the measurements are not correct. This is a lesson learned. I'm not going to mention the sellers website of this liner in this article since I'm using this seller a lot but I do want to advise to measure your helmet and ask a seller about his product measurements before you actually buy. I have used this liner in another German size 62 M35 helmet after drilling 2 new holes in the liner for the front rivets.