A prisoner’s mining helmet from Star Trek VI: The Undiscovered Country. These were worn by the prisoners and this particular piece can be screen matched to one of the helmets in the equipment room on the Klingon penal colony of Rura Penthe when Kirk and McCoy are wrongly sentenced to mine dilithium.

Following a similar design to a welding mask, it has numerous wires and pipes that link up to two lights either side for the workers to see by (the right one is still in full working order), and has an adjustable visor to protect their eyes from the lasers and adjustable hard hat headband inside. It has an interesting paint effect with a brown base layer covered in black and silver spray paint to give it a hardened and abused look, the silver brush strokes on the top corner appearing to match one in the kit room.