If you post the complete serial number, or better yet a picture of it, you will probably get a more accurate response.....I dont think that bike was born with a skiptooth chain, but I dont know much.
is a photo of the underside of the bottom bracket showing the serial number. Part of it is not readable. I have also asked are there any other parts of the bike that have the serial number on it, no answer to that question so far. The serial number starts with G56 and end with A.