Watch List notes:

1916D-37 50c Half Dollar Walking Liberty collection in Library of Coins see both sides album. Inc 1916D, 17, 18, 18D, 18S, 19D, 20, 20S, 21S, 23S, 27S, 28S, 33S, 34, 34S, 34D, 35, 35D, 35S, 36, 36D, 36S, 37, 21S scarce. aVG-VF. (23)