Kev wrote:

I assume you belong to the Oughtred Society for the preservation of
slide rules and other mechanical calculators?

www.oughtred.org

And of course the International Slide Rule Group?

http://tech.groups.yahoo.com/group/sliderule/

to my great shame, no I do not belong (yet) to any
of these fine organizations. Thanks for the URLs!

--Sylvain