Does anyone know what this 1942 military smock is?

[robrinay]

It's brown faux fur British Miltary - (Arrow Mark) and dated 1942. A friend just bought it
http://i1258.photobucket.com/albums...6-71CE-4A75-A1EF-AFE9178A4438_zpsvihk7gj6.jpg

 

[IXL]

I don't know what it is, but please find me one in a size 40!