Yellow, black and white button with black "Y" shape dividing the design into 3 sections.
This Button entitles you to Sole Ownership of the Fair, including the Pike. Assemble at the Illinois Bldg. on Saturday morning at 10 o'clock to celebrate Chicago Day and do it right.
This button was made for "Chicago Day" at the St. Louis World's Fair on October 8, 1904.
The "Y" shape on the button represents the North, South and Main branches of the Chicago River; this "Y" shape has been incorporated into Chicago's architecture, infrastructure, as-well-as countless other places throughout the city. The confluence of the branches of the Chicago River is known as Wolf Point.