![Keystone Watch Co. Dust Proof Pocket 18 Size Pocket Watch in Metropolitan Hunting Case, circa 1890 – Buy – Collect – Sell Keystone Watch Co. Dust Proof Pocket 18 Size Pocket Watch in Metropolitan Hunting Case, circa 1890 – Buy – Collect – Sell](https://collect-sell.com/wp-content/uploads/2019/03/Keystone-18s-11J-c1890-340959-Pocket-Watch-in-Standard-hunting-case-b-copy-800x910.jpg)
Keystone Watch Co. Dust Proof Pocket 18 Size Pocket Watch in Metropolitan Hunting Case, circa 1890 – Buy – Collect – Sell
![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 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](https://upload.wikimedia.org/wikipedia/commons/8/83/Deer_Engraving_on_a_Vintage_Keystone_Pocket_Watch%2C_Case_by_the_Illinois_Watch_Case_Co.%2C_Elgin%2C_Illinois%2C_%22The_Winner%22_Case_Guaranteed_for_20_Years_%288607094272%29.jpg)
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
![Keystone Watch Case Co. Pocket Watch Serial Number Lookup & Identify | Pocket watch antique, Watch case, Pocket watch Keystone Watch Case Co. Pocket Watch Serial Number Lookup & Identify | Pocket watch antique, Watch case, Pocket watch](https://i.pinimg.com/564x/5c/69/17/5c6917e2910c5b7be50bedc71fcf28fa.jpg)
Keystone Watch Case Co. Pocket Watch Serial Number Lookup & Identify | Pocket watch antique, Watch case, Pocket watch
![Waltham 17 Jewels Keystone 10K Gold Filled Pocket Watch Open Face USA Chain Gold Tone Vintage HO - Etsy UK Waltham 17 Jewels Keystone 10K Gold Filled Pocket Watch Open Face USA Chain Gold Tone Vintage HO - Etsy UK](https://i.etsystatic.com/9585373/r/il/166895/2590443642/il_570xN.2590443642_lhei.jpg)
Waltham 17 Jewels Keystone 10K Gold Filled Pocket Watch Open Face USA Chain Gold Tone Vintage HO - Etsy UK
![Antique Hamilton Pocket Watch Railroad Grade 992 Model 1 Housed in this Beautiful 10K Yellow Gold Fill Keystone Case circa 1911 - The Pocket Watch Guy Antique Hamilton Pocket Watch Railroad Grade 992 Model 1 Housed in this Beautiful 10K Yellow Gold Fill Keystone Case circa 1911 - The Pocket Watch Guy](https://www.thepocketwatchguy.com/wp-content/uploads/2019/05/5_37.jpg)
Antique Hamilton Pocket Watch Railroad Grade 992 Model 1 Housed in this Beautiful 10K Yellow Gold Fill Keystone Case circa 1911 - 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 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](https://preview.redd.it/cgfjhyiec8z71.jpg?width=1080&crop=smart&auto=webp&s=0f122fe5ee3ad3de72a7c341c13a532564a50b85)