I'm trying to pick an Abus 65/50, (I've succesfully picked an abus 55/30 if it helps you to know what type of pins I've encountered before). The Abus 65/50 is a five pin lock, according to something I read online it has one serrated and four spool pins.
The pin I have a problem with is easy to move, but it doesn't stay set and when I press down on other pins it becomes unset - does that sound like a serrated pin? And if so how do I set it?