As we research watches, movements, and horology we produce our own reference material. This is listed below.
Please note that this data is based on public sources. Although we try to be careful to be as accurate as possible, it is likely that there are some errors included. Please take this with a grain of salt. We welcome your contributions!
Also, please reference this web site, Grail-Watch.com, if you use this reference material in any other location.