Welcome back! First off, you can't always see the copper core in a 40% half dollar. I currently have over 600 of them and there are several that look like a 90% from the edge. The mint was producing 90% silver half dollars up to 1966 (dated 1964). It is pretty unlikely that a 1969 would be struck on a 90% planchet. Weight would tell the difference. (90% are 12.5 grams while 40% are 11.5 grams)



















