The flat iron piece in Monopoly comes from Chicago, a token originally created to establish loyalty among the Flat Iron Laundry's customers' children.

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Monopoly pieces were small wooden dowels when Parker first released the game in 1935. Years prior, after seeing the Mergenthaler Linotype machine at the World Fair in 1893, National Laundry Journal's Ole Odegard asked the National Laundry Journal, a new owner of the machine, to create small tokens to promote his business.

Two years after the game was first released, the Parker brothers changed the pieces from wooden dowels to a thimble, cannon, top hat, shoe, battleship and the flat iron from so long before.