Old Knives Where Can I Get Information About Old Knives?

Where can I get information about old knives? - old knives

I have an old WW II knives and a knife from the Philippines.
Between the handle and blade of the knife of the Second World War, said, "USN MK2 RCC and contain a plastic sleeve.
The Philippines has a knife, hand carved teak wood handle and a S-symbol on the shard.
Has anyone information about the old, knife or other countries or rare knife?
http://i40.photobucket.com/albums/e224/utabusdriverslc/PHOT0006.jpg
http://i40.photobucket.com/albums/e224/utabusdriverslc/PHOT0002.jpg
http://i40.photobucket.com/albums/e224/utabusdriverslc/PHOT0007.jpg
http://i40.photobucket.com/albums/e224/utabusdriverslc/PHOT0008.jpg
I hope you can see these pictures and tell me anything about these knives.