Paul Ivester’s 16mm Film Stock Identification Page

Paul Ivester has published a great web page about 16mm film stock and how to identify it. Complete with color photos of an astonishing variety of film, this page is houses a wealth of knowledge.
http://www.paulivester.com/films/filmstock/guide.htm
And I would suggest browsing his complete site. Paul has also published a page on film preservation and restoration.
http://www.paulivester.com/films/preserve.htm