The following editions have photographic covers:

Hodder Laminated boards, 1970s
Knight Red Rosette, 1980s - photography David Cox Studios
Knight White Spine, 1980s  
Knight Black Horseshoe, 1990s
W H Smith compilations

The only version to be credited is the Knight Red Rosette printing of the 1980s.  No other version is (as far as I know - if I’ve missed a credit somewhere please let me know.)

All of these printings show Black Boy as piebald.  The one on the compilation edition is interesting.  With the best will in the world, I can’t see that version of Black Boy winning any sort of showing class.  Not at that weight, anyway.