The capsule was also stuffed with newspapers and a copy of the government proceedings that led to the building of the DuPage County Courthouse in Wheaton, The Chicago Tribune reported Friday.
Built in the late 1890s at a cost of $77,000, the courthouse is being demolished to make way for luxury condominiums.
"There's so much history in every one of these documents," says Alberta Adamson of the Center for History in Wheaton. "You never know what stories they'll lead to."
Items found in the time capsule included a tarnished silver dime that said "Bryan Money" on one side and "Free Silver" on the other.
The dime is an artifact from the days of William Jennings Bryan, a 19th Century congressman who was leader of a political group lobbying to keep silver as a monetary standard along with gold.