I obtained this at a Maine estate sale....I thought the 18 under the crown on the case indicated 18 karat gold...I sold the watch for 818.00 but the individual says they gave it the acid test and it is not gold...I now have the watch back and am wondering if the value as an antique is there or should I be happy to get what I can....The maker was Joseph Johnson of Liverpool who was a highly respected & successful British master clock, watch and chronometer maker....He was working in Liverpool from 1795 to about 1851. After his death, his company continued his work. Joseph Johnson is credited with inventing several design improvements to the pocket watch and watch movement. Because this is a Railway Time Keeper, I believe it was made 1850-1870. Thanks so much!