1940's cap badge, but pre or post 1945 ??

[plmurphy]

Here is a recent purchase which I made. It is a basic red army cap badge from the 1940's. I would be grateful if the more knowledgeable among you could advise if it is pre or post 1945 and how you can tell the difference between war time and post war issued cap badges. It is about 28mm from star point to point, made from brass and has a small ding in the hard enamel.

Regards,

Paul