The Detroit Police Department revealed a restored a 1937 Harley-Davidson Knucklehead police bike that was found during the move to its new headquarters.

The 76-year-old police motorcycle was found disassembled at the old headquarters after several decades in storage. According to MLive, the police department attempted to restore the motorcycle in 1974 but never got around to completing it. The motorcycle was placed back into storage until it was uncovered recently.

Harley-Davidson dealership Biker Bob’s of Taylor, Mich., restored the Knucklehead pro bono, reassembling the machine and giving it a police blue paint job and yellow rims.

Chief James Craig tells MLive the Detroit PD was one of the first in the country to use Harley-Davidson motorcycles. The 1937 Knucklehead would have originally been red and cost about $450. Today, Biker Bob General Manager Trey Hahn estimates the restored motorcycle would be worth between $20,000 and $30,000.

The restored 1937 Harley-Davidson will be displayed at the Detroit PD headquarters.

[Source: MLive, Biker Bob’s Harley-Davidson (Facebook)]