Today I finally got my great-great-grand-father's IWC watch, but no one in my family knows anything about this beautiful piece. I hope someone here could help me to find out a little bit more about it. The information i have is that it comes from Brazil in the early 1900's and that there are some engravings inside its "door" (i don't know the right term for that part), one of them i think it's the case number (327286) and the other one is "International Watch Co Médaille d'or" here are some photos of it:
Thank you for your help
Gui