He is fully authentic helmet of the Second World War, besides the stamp of the manufacturer's year (1953). The helmet was produced in Stalingrad, at the factory, Red October.(ЗКО) helmet in perfect condition, such helmets are already very rare.
— 10 USD by Russian Post
— 25-40 USD by courier service EMS
— 30-40 USD by Russian Post
— 40-60 USD (depends on customer's country) by courier service EMS
What is the difference between Russian Post and EMS courier service? Read here - link