need informational help.

I just today picked up a used RG220 for a $150, got some scratches and one good dink in the finish on the backside of the lower horn, lucky it was just the finish, and did not dent the wood, as I will want to be getting it refinished possibly, Here is my question, I can't make out what the serial number means, I would like to know what year it was made, etc. Can anybody help me decipher this? serial number is, RG 220 C8027688 made in Korea. Thanks to anyone who can help.JCA