I have a Heuer watches. But I don't have any information abut it. :( I need help. Can you tell me about it?

I know only that my Grandfather brought them to war. He withdrew them from the hands of the murdered German navigator. But in the 80th years, broke the chronograph and the master clock to repair it pulled. Today, the master looked up the clock, did care. Master said that the machinery in good condition.
I need any information about these clocks. Also of interest to know whether it is possible to install them again chronograph. Also interested in their historic value. And of course interested in monetary value.