How do you open the case for a Bucherer automatic...

Question

This watch isn't running - the front crystal snaps off readily but I don't see any way to open the back (it doesn't have a slot to insert a tool). The back of the case has the logo along with 1888 and the words: Swiss Made Waterproof Automatic Antimagnetic Incabloc and also, very faintly underneath 1510 A.
This is a circular watch. Since the hole for the winding stem is completely contained within the side (that is, the opening doesn't communicate with either the front or the back) I assume you may have to pull the stem out and the movement would be removed from the front?
If there is a book that one can purchase that provides instructions on opening different types of watches I would be interested in it. Thanks.