SKF NOTE: Thanks in advance to the person who solves this mystery.
A member of drummer Gary Chester’s Facebook page would like to identify the drummer in these photos. My best guess: Irv Cottler.
As of this writing we don’t have a verified winner. I can be reached through this blog, or you can respond on Gary Chester’s Facebook page.
SKF NOTE 8/13: Paul Testa on The Great Drummer’s Group Facebook page solved the mystery. The drummer in these photos is the splendid Vernell Fournier.