I know we can’t put an exact date on it but there must be a rough time period when they fell out of common use. Maybe it was after 1964 because the silver was too valuable to use them? People wanted to save the new Kennedy? Ever seen a worn, circulated Kennedy half? Silver or non-silver? Not many. Was looking at some early WLHs today and am just amazed how many are in VG condition or even much worse. You’d have to think there’s a good decade or two of circulation on them. Maybe three or more? The WLH was a workhorse coin based on how many worn down examples you see. In 1916-1917 doesn’t look like many people set them aside as keep sakes.