Greeting to all,been lurking here for a while and gainning knowledge.I recently purchased my first SC/TI S&W (gunbroker),it's the 329 pd, the seller claims to be NIB and it appears to be,after inspecting the gun I noticed some spots on the face of the cylinder and I am not so sure if this is normal.Feed back is appreciated.

http://img685.imageshack.us/img685/573/dsc00947ip.jpg
http://img99.imageshack.us/img99/5780/dsc00948n.jpg
http://img717.imageshack.us/img717/4307/dsc00942h.jpg
http://img97.imageshack.us/img97/9485/dsc00943pn.jpg