I have been playing around with locks because of not knowing much about them so i decided to get out my lockwood 234/45 and opened it up, it had the normal pin in it and then i opened my friends lockwood 234/45 and it had these pins in it. i have provided a drawing below.

I understand these might be some type of security pin and the extra smaller parts might falsely set but i am unsure. i have looked through modern high security locks and saw a picture but it just told you about the lock and not the pins. Could anyone shed some light on this.
Cheers
Geek