How do know the stocks are original? Are you the original owner? If not, it is likely that your Python had its stocks replaced sometime in the last six decades. Every set of gold medallion full-checkered stocks ever for sale represents a Python that no longer has its original stocks (except for those that have been "created" by installing gold medallions in place of silver medallions). Almost every set of gold medallion full-checkered stocks ever sold represents a Python getting an original-looking set of stocks to replace incorrect stocks.
Unless you've owned it since 1957 there's about a 99.9% chance those aren't the originals if they are in fact silver. Colt never never never used silver medallions except on the Python Elites and those had completely different stocks. There is a chance they got so faded over time that they appear silver but are really just very pale gold. I've seen many known examples that are actually gold but look silver. It can take a very trained eye to see the difference.