Extremely Rare WW1 Revolver Lighter - Restoration

My restoration video of an extremely rare artifact from WW1. Antique lighter in the form of a pistol revolver made of brass. This antique lighter is over 100 years old, but has been very well preserved. It was found in the places of the front trenches of World War 1. We assume that this lighter was made by one of the soldiers and is the only copy in the world. During the restoration, I tried to preserve the surface and leave all traces of antiquity that the lighter has acquired over time. Corrosion damaged only the upper part of the surface of the lighter, only micro damages (shells) appeared in the brass. Have you seen similar vintage rare items? Maybe you have them)