1939 & 1941 Malaya King George VI proof 10 cents coins

Numista shows there are proof coin for Malaya King George VI 10 cents. I haven't seen one, even I have seen one I might not know as they could seem the same to my untrained eyes. Can anyone having those proof 10 cents coins post some photos side by side with the regular coins? I would very much appreciate to learn.  

Difficult to discern even for an expert. If a proof example entered circulation somehow, virtually inpossible. As you can see, even those in a museum (below) can be less than well preserved. Great details but the patina does not help it's visual appeal. The example below is a Proof 1939 from the Victoria Museum in Australia. The other is UNC example. 

Proof

Katz Auction UNC

I heard from someone that one way to discern is to look at the rosette on the reverse bottom Franking both side of the date. Really?