Not mine Just sharing . It is in 400.000 serial range. 24 inch. https://www.ebay.com/itm/Savage-Model-99-24-Inch-BARREL-300-Savage-Vintage-Rifle-Carbine-Gun-Part-20-PICS/203272426411?hash=item2f53fb13ab:g:e8gAAOSwq3dgII01
It happens. I got the New, Old Stock .358 barrel that sits on my 99E now off eBay in 2007. It'd never been fired. Frank Wells of Tucson swapped it for the factory .308 barrel.