Welcome to Chronicles BakaTensai!
I think the phrase you might be searching for is
Steampunk thought that is more Victorian/Edwardian than Second World War.
Read this thread:
http://www.chronicles-network.com/fo...steampunk.html and you will see that I have also been on a learning curve for the last few years too.
If that is not what you are looking for, can I suggest 'The Man in the High Castle' by Philip K Dick, or the alternative history books of Harry Turtledove. There is actually quite a lot of alternative history in print, and much of it takes the Nazi Regime as the starting point for the schism in Time.