To make that design on the pouch flap, you cut it out of the flap leather itself. Then you glue or stitch a piece of either leather or clothe to the back side of the flap. You then see the backing material through the parts you cut out in the flap. You just have to be carefull when laying out your design that you leave little connecting strips between different elements of your overal design - to help hold pieces in place that might "drop" out. It's a lot like making/using a stencil.
Gluing the backing piece in does work, but can loosen in time and use. So many of the designs are stitched all around the edges of the cut-out design. But that extra stitching also adds to the design - a lot like embrodery.
And the simpler designs tend to show up better. Like a heart or that cross with the extra rays.
I'll have to see if I have any pictures of my guns. I've had them for a number of years. But I also got some pretty good deals on them - way back in them dark ages. The one I got for $400 usd, the other two for $200 usd each. This was less than half of what they were worth and could have sold for at that time. And YES, at one time I did have my Hawkin Rifle - made by Old West with Sharon barrel in .54 caliber. It was a great gun and I passed it on to a friend when my historical time period changed. (And I've been trying to talk him out of it and get it back since.)
The NW Trade gun is .58 caliber, the Tulle is .62, and the Brow Bess is .75. I use them for hunting all the time - from squirrels/rabbits on up to deer. As with all hunting, you have to place your shots carefully - first to quickly kill your game, second to not destroy too much of the meat.
Occasionally I also take out the cap-n-ball revolvers - 1851 Navy, 1860 Navy, and 1861 Army. They are .36 caliber and .44 caliber. Pea shooters, but very effective on rabbits and squirrels - much like a modern .22 but with a little more lead. And they all could take deer sized game if necessary.
And then there are the cowboy/old west toys - the Henry, the '66 Yellowboy, the '92, and the 1874 Sharps Business rifle for buffalo hunting - plus assorted Peacemakers, gamblers hideouts, and soiled dove specials.
Oh, the ... toys ... we sometimes play with.
And YES, I am glad that I live where I can play with them. My apologies to those less forturnate!
Mikey - surrounded by several centuries of firearms history
p.s. NO, in all my years, I have never used them to commit any crime. I guess their "evil influence" just hasn't worn off on me yet.