Wow, that is a funky retainer clip... anyway, if you remove that retainer clip and insert the key, then turn 90 degrees you can pull the plug right out just like American... I can put my drivers and springs back with a pair of tweezers pretty easily with a real american brand cylinder, but I would recommend making or buying a plug follower for that one.

If you don't, you'll just have springs and driver pins to put back.
On most of the American cylinders that I have seen, the tail of the plug is not a half circle but a quarter circle so this padlock would probably be key-retaining or something. (As well as not being vulnerable to the same bypass that similar looking models of American are open to.) Having only a quarter circle for the tail of the plug lets you spin the plug back and remove the key without having to lock the shackle.
American has serrated, spool, and other security pins, I would assume this probably does too. Look into the keyhole and see if there are grooves in the first keypin or not. Then you'll at least know about that pin and if it is a security pin, then you can be sure there are more.
Have fun with it!
