They have a web page at http://www.sektor.de/sol_invictus/
this also reports that their e-mail address is [EMAIL PROTECTED] Perhaps their server was down when you mailed them? Failing that you could try snail mail to: SOL INVICTUS GmbH Sonnenuhrengestaltung Laurentiusstr. 49 52072 Aachen Tel: 0241/174921 Fax: 0241/173424 Patrick
