The claim is sometimes made in print that Russell exhibited at the Centenial Exhibition in 1876. We looked through every list of exhibitors we could find and came up with a blank. Ton pointed us to May 8, 1892 Pittsburgh Dispatch which says the Watch Tower Bible & Tract Society of Allegheny was on the list of exhibitors at the World's Columbian Exhibition in Chicago that year.
I think the two events have been confused in oral tradition.
Also the name "Old Quaker Store" is slightly in error. A legal notice in the Dispatch of Sept 18, 1892, names it as the Quaker Shirt Store and says its motto was "Truth, Fair Dealing and Low Prices."