Offer is the very rare vintage ITT image intensifier tube super large size 75mm diameter. I'm not sure about the model print label ITT Electro Optical Division on the acrylic housing is correct or not, model 41x0?? I can't see clear and read the model number due to the print label worn out. Both input and output are thick fiber optic faceplate, both are 75mm diameter, proximity focus, it seems the photocathode is the S25 type base on the violet material surface. This is the Gen 1 type, very high resolution, image display line pattern test is perfect, no distortion. It can be used for ...