An introduction to horology and timekeeping, including links to the history of timekeeping, as well as some resources for projects for children to help teach them some concepts: https://www.jomashop.com/academy/article/a-history-of-horology-clockmaking-and-watches/ (Our thanks to the Garcia family for this link, and especially to Emilia who used this link and many of the websites we recommended on this page for her historic inventions project for her Social Studies class!)
GENERAL WATCH LOOK-UP RESOURCES AND RESEARCH TOOLS:
A remarkable tool to research most American pocket watches: https://pocketwatchdatabase.com (Please note that due to the extensive database here, some of the information is extrapolated from things that are known but have not been directly observed. Always verify your information.)
A great resource for early colonial-era pocket watches, including American, English, Dutch, and Swiss, put together by Richard Newman and including recommended reading on particular makers: https://www.colonialwatches.com/all-watches
Jones & Horan's own sales archives: www.archive.jones-horan.com Prices and basic info can be had on items sold in auctions back to 1992, basic images and info is available on items from auctions 1996-2004, and full information and photos are available on lots in auctions from 2005 to the present.
ORGANIZATIONS FULL OF RESOURCES (SOME THROUGH MEMBERSHIP):
NAWCC, a community of watch and clock collectors with extensive records, research, education, venues for information exchange, etc: https://nawcc.org