Fur stole - 40's or 50's? Help with identity please?

Hi, I have this beautiful stole, bought in a thrift shop quite a few years ago in England, which I have worn on a few occasions. I think it has the most beautiful glamorous shape, padded shoulders, lower cape shaped back. If anyone could help identify the fur I would really appreciate it, and also the era? Maybe the 40's? or later? Thanks so much.

 

Having investigated further I think it may be brown ermine, and from the 40's? Would love to know what others think?

 

Thanks Mary Jane, do you think that Russian Squirrel is normally "wider" and also has contrasting colors? Do you know anyway to tell the difference between RS and Brown Ermine? Hope I am not putting the cat amongst the pigeons!! It's like being a private detective!