Dwight’s Soda had a series of cards for Useful Birds of America. As opposed to the un-useful birds like the cowbird. Some good info on the series of cards can be found at Deseret News. This Prothonotary Warbler is copyright 1922 and Third Series Number 7. Dwight’s soda is baking soda (bicarbonate of soda), not soda pop. I’ve already sold this card.