1930's D.W. King Sight Co. 4 page circular measuring 8-1/2" x 11".It has King front,rear, peep and shotgun sights listed by gun maker with prices.There is no application chart or sight part numbers listed.There is no date or code but I believe the listed prices indicate circa 1930's. Very good condition with light foxing,creases where folded for an envelope and the lower right corner has been clipped.