I emailed wexlers about that 1957d. He said that there was a guy labeling and documenting all of the wheat ddos,rpms and he suddenly passed away last year. He only made it to 1950d and the guys family got the coins after he died and wexler can't get them back. So he won't attribute any coins there after. I dont know why and it seems like he'll never get those coins. It's a long sad story for coin collectors.