Size 55. By karl Heisler of Berlin. Basic helmet without provision for internal avionics. Suitable for 3-strap oxygen masks having flat hooks to either side and provision for an integral forehead straps (missing). This example is in the rarer grey leather lined in lambskin fleece. These grey ones may have been intended for elite Me262 squadrons who were issued with grey leather flying suits. Other than the missing top strap this helmet is in super, clean unused condition. Stock code H16880.