Hunter Cased Pocketwatches

Hunter or hunting watch cases have a hinged front cover. A steel latch holds the cover shut, but the cover itself is a soft metal. Because of that, in spite of what we see in movies, it is very important to press the crown in when closing, to pull the patch back, it rather than "snapping" it shut.

Otherwise, the latch part of the cover quickly wears and then the case won't stay closed.  In many instances this is unrepairable.