Pristine Elgin Pocket Watch Scarce 19 Jewel Railroad Model with Up / Down Wind Indicator Housed in a Keystone Mainliner Case circa 1913 - The Pocket Watch Guy
Keystone Pocket Watch Case] I just inherited this Elgin pocket watch and was hoping to gain insight from this forum about the Keystone pocket watch case. I've not found an online guide
Antique 1880 Elgin Pocket Watch, 11 Jewels, 18 Size Keystone J. Boss 20 Yrs | eBay
File:Deer Engraving on a Vintage Keystone Pocket Watch, Case by the Illinois Watch Case Co., Elgin, Illinois, "The Winner" Case Guaranteed for 20 Years (8607094272).jpg - Wikimedia Commons
Elgin Pocket Watch With Keystone Watch Case - Etsy UK