In the trailer, the lead characters are facing each other for a shootout in town, and there are a number of straw bales, or hay bales. They are perfectly cuboid just like ones produced on modern day baling machines,. Also if they are straw bales, then wheat was not planted in sufficient quantity to make machine baling practical.
Final film role of Mike Hagerty.
Anachronistic prop placement: Thomas Jayne's character smokes from a pipe with a plastic stem. Since this movie takes place in the Arizona Territory (established in 1863) and plastic was invented in 1907, the stem of his wooden pipe shouldn't have existed yet for at least 35 years minimum.