Why is there a hole

I know you are looking at the hole and wondering what it is for.. Well a gun that small isn't much good for Bear so why not tell time with it as well.. 8$ later I had a small clock that popped right in.. Now you know how long you were at the card table.. Might keep Dangerous Dan Mcgrew from making off with your lady Right? With a watch like that right? What time is it well....... heehehe