I am attempting to re-key a euro-style cylinder for which I have no key. I have picked it and rotated the core 180 degrees but every description I have read says that there is a circlip that holds the core in place that must be removed to release the core. This particular cylinder does not have circlips but instead there seem to be washers with two indents around their perimeter that are not removable that I can see. The washers are continuous around their entire perimeter so I can't see how to remove them to release the core to slide it out. Attached are pictures that show the cylinder as well as the washers. Any insight into how to remove this core would be greatly appreciated.
http://i.imgur.com/0QcoCFI.jpg
http://i.imgur.com/oJC6rEG.jpg
http://i.imgur.com/7rECLEA.jpg
http://i.imgur.com/X1ubRnS.jpg