At left, it's plain to see both uniform numbers of Denis Dupere, not to mention he played four seasons in high-profile Toronto. Yet the card claims he's Stan Gilbertson, who wore #15 for the Caps after Dupere departed.
To be fair, their resemblance - besides Stan's clean-shaven face and curly blonde hair - is uncanny.
On the right, this is indeed Bill Clement. The person assigned to paint over his uniform apparently failed watercolor class. Either that, or he was a 3rd-grader, or someone who had never actually seen the Capitals uniform.