Vintage Color Postcards from the National Wildlife Federation Wildflower Series, 1957. Three signed by Peterson (Turk's Cap Lily, Red Turtlehead, Narrow Blue-Flag), two signed by Al Kreml (Greater Bindweed, Wild Geranium), and two signed by Weber (Twin flower, Devil's-Head Cactus). Divided backs, all unused. Condition: These are original vintage color postcards, not a copy or reproduction. The Kreml Bindweed card has a small blemish along the center right edge, and the Peterson Turtlehead has a slight abrasion in the upper right corner, otherwise these cards are in excellent to near mint condition. Comments: