Resources for researching watchmakers

Here are links to websites that I visited when trying to discover more about the watchmaker Kover. I'll update this post if I find any more resources:

The Worshipful Company of Clockmakers - http://www.clockmakers.org/
British & Irish Clock and Watch Makers (c1600-c1940) - http://www.clockswatches.com/index.php
National Association of Watch & Clock Collectors, Inc. - http://www.nawcc.org/
Cogs & Pieces (Dealers in fine antique pocket watches) - http://www.cogsandpieces.com/
Antique Pocket Watch - http://www.antique-pocket-watch.com/
Antiquarian Horological Society - http://www.ahsoc.demon.co.uk/home.html
Sources for clock and watchmakers at Guildhall Library - downloads as a pdf
Old Scottish clockmakers from 1453 to 1850 (1921) - a book available online in a number of formats

If you know of any other resources please add them in a comment or email them to me and I will add them to the above list.