----------------------------Original message---------------------------- No-one has mentioned Geochron lighted maps (World Time Indicators) which I suspect is what was intended. They sell in the thousands of dollars. The clockwork machinery inside generates a sine-wave shade behind a lit mercator map. The shade changes shape over the course of the year to reflect the angle of the sun. Their contact in the 1994-5 IMTA directory is: Geochron Enterprises, Inc 899 Arguello St Redwood City, CA 94063 415-361-1771 * Fax 415-361-1780 Hope this helps. Nat Case Hedberg Maps White River Jct, VT