Now I am puzzled. Would like to see a chip of bombay ivory. Maybe it looks like white. The late print date on the data book concerned me but I still have to wonder about it's reliability. I would have considered it a reprint of an original factory document. I started looking thru the packet I received from Bob Adler and it agrees with your info that Bombay Ivory came in to play in 1955. I plan to look thru it more in the near future.