The Milton Bradley Company was an American board game manufacturer established by Milton Bradley in Springfield, Massachusetts, in 1860. In 1920, it absorbed the game production of McLoughlin Brothers, formerly the largest game manufacturer in the United States.
Milton established itself in the early 1800s
Milton established itself in 1860. By definition that is the later 1800's, not the early 1800's. The model probably only looked at it being in the 1800s