AO1044 Phototube for MicroStar Series 10 & 110 Trinocular Heads

Our replacement 1044 phototube for American Optical series 10 / 110 microscopes.  The AO1044 phototube provides a standard 23.2mm internal diameter / 25mm outer diameter tube at the parfocal distance for these microscopes.  This is a new copy of the original American Optical catalog number 1044 tubes.