PCGS 50c 1941 walking half double-struck with the 2nd strike 5% off-center, and with a large expansion in the coin's size. The first strike was in-collar, giving the coin a fully reeded edge, and the 2nd strike was 5% off-center of the 1st strike.
There is a decent amount of design showing around the outer part of the design, especially on the reverse which has a obvious double set of lettering "UNITED STATES OF AMERICA", while the obverse shows the doubling the strongest on the date area.
Walking halves are very rare double-struck, and most of the on-center strikes like this one are circulated, and not particularly attractive. This is a much nicer example with a relatively high grade.
PCGS MS-63 with great eye appeal on the obverse, although with a toned-over, scratched on the eagle on the reverse. Double-struck walkers pretty much impossible to find totally problem-free, and this coin's superior high grade puts it about the typical example.