Lor,

If your asking about what your collection is worth?

There are "marks" usually on the bottom of the PM. The mark will indicate the year it was produced. In the begining there were no marks which makes them more valuble to a collector. Each year of production brings a new mark.

Your catalog should show those symbols (marks) and dates along with the current value (I think). It's been quite a few years since I went looking. If your in doubt then find a retailer who handles pieces that are on the secondary market and he/she should be able to tell you.

Any other questions or if I confused you please let me know.