I can see why... the plug diameter is almost 3/4" - far larger than any euro-profile lock I have ever seen. Probably can fit it into a Scandinavian Oval format.
Note of caution taking the U-Change apart - if you want to disassemble the key pins, be careful! The internal spring is strong and will (not can...will) launch the end of the key pin you are not holding a looooooong way! Luckily, was taking it apart in the living room instead of where I normally do my lock work. The tile floors made it possible to find the spring and half the key pin
both times they launched.

For the other three key pins, took them apart inside a plastic bag.
Gordon
Just when you finally think you have learned it all, that is when you learn that you don't know anything yet.