An original model that was used for the famous "Spirit of Detroit" sculpture is going up for auction.

Marshall M. Fredericks sculpted the 10 1/2-inch figure during the process of making the full-sized bronze version, which sits in front of the Coleman A. Young Municipal Center off Woodward Avenue in the city's downtown area.

Fredericks worked on the 26-foot sculpture at a foundry in Norway for years before it was brought to Detroit and dedicated in 1958.

SOD workers

The Dumouchelle Auction House says the model version was left behind in Norway as a gift to Fredericks' family, but it will now be auctioned off on Sunday, Jan., 19.

SOD sketch

According to the auction house's website, the model sculpture is estimated to go for $15,000 to $20,000.

SOD foundry mark

The auction begins at noon at 409 East Jefferson Ave., Detroit. The auction will also feature another one of Fredericks' sculptures, "Baby Baboon."