These trading cards were produced by Pacific Trading Cards in the late 80's and early 90's. There were three series of the trading cards (three sets of 110 cards).
Series 3 (#221 - 330) has a handful of color photos and the rest black-and-whites on its cards, and Series 3 also has several photos from the "Danny Thomas" pilot episode.
This is likely to become the rarest of the Mayberry trading card sets, in part because so few were made. But we we've still got a couple of sets at a really good price. Hurry before Ben Weaver realizes we've slipped up on the pricing!