I think the card in question was printed with a laser printer from an original. At first I thought it was a moire pattern from a scanner but look at the white areas on the edges as compared to the unprinted borders of the card; a scanner-created pattern would appear everywhere.
One slight correction to some of the posts above: the Universal Matching Series cards in their various permutations are sometimes found with blue rather than black ink. Holds true for the analogous W529s as well.
