I was able to enjoy a few hours in the library today and was lucky enough to stumble over ... well, it's a long list, but the most immediately relevant find was a book giving illustrated examples of coins from the diverse nations of the 20th Century, which inspired me to wonder how different currency would be in the STORM FRONT/CHOSEN OF THE VALKYRIES/RAGNAROK timeline of Mr Christopher Nuttall.
For one thing I'd bet British currency would still be pre-decimal as late as AD 1985, there not being a European Customs Union the United Kingdom would be willing to join (much less keen to accommodate) when the Third Reich holds the whip hand on the Continent (On a more cheerful note, there's probably still a reigning monarch on Italian currency, so not all the changes are prompted by Fascist B*******).