It looks like it has a 110 years of dirt on it too!
The “dirt” is probably a very thin layer of metal (tungsten?) deposited on the inside of the bulb. This would be the same material as the filament. The bulb has lasted this long due to the lack of thermal cycling from turning it on and off.
The vacuum tubes in Cheyenne Mountain (NORAD) lasted so long for the same reason. The old vacuum tube system lasted until the late 80’s early 90’s