Published: Davidson and Todd Ltd, Port of Spain Spain
Card has “1907” on the back, after publisher’s name (Dr. Trenkler & Co). It very well be the year. It is of that era.
On the back:
Union Stock Yards, Chicago.–Showing some of the pens which hold the many thousands of cattle which arrive daily, and are slaughtered and shipped to every point of the globe. Two of the largest packing houses in the world in the background.
No date, but maybe c.1910 based on card.