More on "how to spot a well-made holster"
These pics show how it can be as easy for you, as for a professional, to spot quality stitching; i.e., stitching that is tight and strong and won't come undone.
First a pair of pics that show what can be wrong with stitching on BOTH sides of a holster:
Attachment 61471Attachment 61472
Such a holster should not be allowed to leave the shop of a quality maker.
And then a pic of what stitching looks like when it's done well, using a genuine saddle/harness stitching machine:
"Tight is right". Not apparent from the pics, is that a well-made holster seam will be GLUED and then the seam will be hammered before stitching; so that the gluing and stitching complement each other for strength. Check this by squeezing the holster pocket while watching the edges of the holster seam; unglued leather will spread.