About my lockpicking-history (a whole 2 weeks

After I had successfully picked several locks I had lying around the house, I got a lock from eBay that sounded cool (you see I'm a total beginner, buying locks that sound cool

So I just had to take it apart and see what's inside. Of course I became a bit overambitious and more or less ripped the thing carefully apart


Here's a picture of all the parts:

Now, for my questions:
1. Does anybody know the exact "name" of this lock? It says Zeis Ikon, JUNIOR and BZA 61 (though I think this is a mark from the previous owner). The eBay-Auction also said "TK5", but that can be nonsense, too. There are some locks on the IKON Homepage, but none resemble this lock...it's probably quite old...
2. What purpose do these little discs (in the top right corner) serve? I noticed that you need one per plug, to fill it up to the shear line. But that leaves me with 2 discs. Where do they go?
3. What are the little balls in the springs good for?
Looking forward to your answers!
Thanks in advance!
scholls