I know the forums are not for adds. I have no ties to this museum. I've searched a long time for a book, Hampden Watch Co, NAWCC Special Order Supplement #1. I came across the American Clock and Watch Museum web site. http://www.clockandwatchmuseum.org At the bottom left side of there web page is a link to there "Used and Rare Books". I found a copy of the out of print book . I called them up and ordered it. They have a lot of old books listed. The museum is a non-profit charity.