Probably from spinning in different peoples hands for the last 100 years. Very nice speedo for an older bike. Check out my other auctions. The item "Original NOS HARLEY, INDIAN, HENDERSON, ACE MOTORCYCLE CORBIN SPEEDOMETER" is in sale since Monday, September 28, 2020. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Antique, Vintage, Historic".
The seller is "bigwampum" and is located in Cave Creek, Arizona. This item can be shipped worldwide.