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It's a good looking jacket. The advice I have is wipe with a damp cloth (just water) occasionally. After maybe 10 years wipe with a cloth damp with leather conditioner.
It looks like when you lift the pocket flap all the stress is just in front of the press stud.
Could you make a 1.5/2" square patch with a hole in it for the press stud so stress is applied to both sides of the press stud. Thin leather, a piece of ribbon, thin plastic?
Just thinking and...