case was manufactured by the Crescent Watch Case Company. It is a 14K gold-filled case and was guaranteed by the company for a duration of 20 years (if it is not marked "25 Years" somewhere on the case; your case is in a transitional period when the guarantee durations were being increased by the case companies). https://pocketwatchdatabase.com/guide/case-companies/crescent-watch-case-co/grades/Crescent-14K20YR. movement was manufactured by the Elgin National Watch Company and is classified as a Grade 249 (18-Size, Model 4, Gilt Plates, 7 Jewels), c.1900. https://pocketwatchdatabase.com/search/result/elgin/8826367 Here is more information about the Grade 249, with a total estimated production of 31,000. https://pocketwatchdatabase.com/guide/company/elgin/grade/249

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