Speaking of chronographs - does anyone know anything about old ones? I have a great piece of machinery, mostly brass, weighing probably 50# with some of the finest machining I've ever seen - do not think it is complete, but is fascinating. It's not accessible for photos just now. Marked Modern-Bond as I recall - electromechanical (VERY mechanical) in operation. I'm guessing 1930s, but could be earlier.