The Salearea Coach Guides posted at Ebay go into a lot of detail on creeds and serial numbers, you may want to read them especially the ones on those 2 subjects when you get a chance.
http://search.reviews.ebay.com/members/salearea?uqt=g
Thanks! I'm going to bookmark this for sure. Also I have been slowly making my way through the whole Answers to Authenticity Questions thread in another tab. Fascinating stuff!