Vintage Pocket Watch Elgin 12s, Hunter Style, Circa 1916. in Keystone Gold-filled Carved Case. Nice Watch Running Well. Great Gift - Etsy UK
Vintage Elgin B.W. Raymond Pocket Watch from 1890 | KeepTheTime.com
Elgin watch and keystone case... What is this?? : r/pocketwatch
Elgin Pocket Watch w/ Keystone Case | WatchUSeek Watch Forums
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