For chips with initials on older molds, start with the Preserving Gaming History site, which contains many manufacturer's (or distributor's) records. Start with a company that made or distributed the mold at issue:

http://www.preservinggaminghistory.com/taylor/taylor.htm

Look for your chip and be careful to match the font with the cards shown. Good luck.

Nice chip haul, btw. Any pictures of the casinos by any chance?

Michael Siskin