Attention, auto enthusiasts: The "holy grail" of Chicago license plates is up for auction.
A black-and-white aluminum plate stamped with just the single numeral "1" gives bidders a chance to earn a piece of automotive history. The plate was made in 1904, the first year that Chicago made metal license plates, and the only year the city made plates from thin, stamped aluminum, according to the item's description on the auction site.
