1939 s42 vs just 42

[uvarmint]

I just bought my first Luger. It is an all matching including one mag 1939 S42. I'm hearing that 1939 was the demarcation point between s42's and 42's making the s42 1939 somewhat (maybe a little?) rarer thana 1938 s42.

My question is: Given the same condition, is a 1939 S42 worth any significant premium over a 1939 42?

Just learning in WI