Event_Photo-Credit-Courtesy-of-RM-Auctions-(2)

The RM Auctions Dingman Collection sale included more than 1,000 signs and other pieces of automobilia. (Photo courtesy of RM Auctions)

The RM Auctions Dingman Collection sale included more than 1,000 signs and other pieces of automobilia. (Photo courtesy of RM Auctions)

The RM Auctions Dingman Collection sale included more than 1,000 signs and other pieces of automobilia. (Photo courtesy of RM Auctions)

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