2024年10月25日 · The "W. W. C. Co." trademark in the attached picture, I assume, is Wadsworth Watch Case Co. However, I have been unable to find any Encyclopedia, Jeweler's of the Kindred Trade, or any other reference that depicts this as a Wadsworth Watch Case Co. trademark.

2009年4月30日 · The Elgin National Watch Co. was the largest American watch company in terms of jeweled movements produced, over 50,000,000 in its approximately 100 years of building watches from 1866 to the 1960s.

2009年5月3日 · Keystone was not absorbed by E. Howard, rather the Keystone WCCo bought the rights to use the Howard name and made what are known to collectors as Keystone Howard watches in Waltham, Mass. from approx. 1903 till 1927 or 1930 (depending on source). After Keystone stopped making pocket watches Hamilton bought the rights to use the Howard name.