Here is another picture of all the items in that bag. There was a hole so I am not sure if anything might be missing.The bag with the O-ring is a top end seal kit. The red O-rings are for the cylinder base, the metal caps are lifter seals, and the 4 slightly smaller O-rings look like they could be for the tappet covers.
The only problem with having them that polished is that if they ever get wet or go through a warm and cold cycle they will end up all oxidized again. If you can store the bike in a warm dry place over the winter you will be fine.