Ha Ha! Not quite a time machine but a fair bit north. Sweden. They never seen any reason to change to 21mm. I suppose it is a case of if its not broken don't fix it. Quite odd actually as they are militantly metric about everything else.
I can believe that... a while ago i was chatting up a bird from Sweden and i told her i had 'Half Inch and a dozen wrinkles' and she just up and walked out the pub... i never knew why until NOW!