Gao Yang, when he received the lined guns, also received a gun case.
Like the shotgun, the gun case also has a historical value. Made of tanned calfskin, it is very soft and different from the modern hard-shell gun cases.
Gao Yang likes antique guns, so he knows that if a gun has any replaced parts, its value is significantly affected, and if the gun itself is very well preserved and maintains its original state, that's already admirable. If the accessories beyond the gun itself are also fully preserved, it enhances the value even more.
The gun case is one of the gun's accessories, and only very precious guns come with their specially tailored cases.
It is well maintained, though its age and traces of the years are visible, it is very intact, and almost without any damage, which is quite rare for leather goods.