[doug.goodman]

My mistake, you are correct, and I have corrected my list :

Cards #1 thru #110 have white backs only, including all 3 variations of #40.

Cards #111 thru 198 have gray backs only.

Cards #199 thru #286 were each issued with both white and gray backs.

Cards #287 thru #374 have gray backs only, including both variations of cards #316, 321, 322, 336 and 362.

Cards #375 thru #440 have white backs only, including both variations of #416.

Cards #441 thru #506 have gray backs only.

Cards #516 thru #572 have white backs only.

The "master" set contains 668 cards.

That's what happens when you do things like this without the actual cards in front of you.

Doug

PS - I am hoping to have my 1959 set posted to my flickr sight soon. A couple more long flights should do it.