Help please on Book edition Slaughterhouse Five 1969

I still have that book along with many from the same era. Of course, I never get rid of books (much to hubby's dismay) so they are all over the house. Shelves in every room! LOL.

 

The book may be marked as a Book Club Edition. Often there will be a blind stamp on the rear cover. I have seen this book with a square blind stamp at the bottom of the rear cover next to the spine. Thus, BCE.