The S4250 is a miniature camera tube.
The faceplate and target.
The gun components and base.
The focus anodes.
Each ring is held in place along the length of the tube by ceramic insulators.
The target is connected to the base by wires that pass inside the insulated supports.
The end window envelope is 13.5 mm in diameter, and excluding the base pins is 86 mm tall.
Updated June 21, 2013.