So, I was going through my parent's safe today and came across my grandpa's old watch. It is a Longine but I know absolutely nothing about it. On the back casing all it say is next to a little star "10K ROP Bezel Stainless Steel back" that is all the information on this watch. I don't want to take the back casing off so I was wondering if anyone could give me any information about this watch. Thank!