I'm over here again.
It seems no matter how many times I tell my friends I don't work on battery watches, they keep bringing them to me and ask, can you fix this? I have a question, How do you tell if a watch has a split stem? I know some movements have a little button that you push and then pull the stem out. What is the correct way to recognize and remove a split (two piece) stem?
Thanks,
Brian C.

Brian,
Two-piece stems or slit stems as they are sometimes referred to, are used on cases that the back does not come off. These cases are called one-piece cases. The movement comes out from the front of the case after the crystal is removed. The following pictures show the process. Hope this helps

the tool

business end of the tool

The crystal removed

the movement and stem and crown

Female part of the stem

Male part of the stem

Thanks Rich,
That's exactly what I wanted to know. The 2 piece stems, are in one piece cases.
Brian C.