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MoHMA X-Ray Tube, Coolidge 18.5” long tube with 3.5” globe 1/3 of the way. One end is a socket, the other a solid copper rod,(baffle goes on here and is missing). The rod leads to an expanded target at one end opposite a source of electrons from the screw end with a tube within the tube. The round part of the tube is stained violet from the radiation. On bulb is imprint, Coolidge Tube, GE and serial no. 81714, 30 ma, patent dates Same as this but without the baffle and with patent dates instead of numbers. See another with a baffle for heat dispersion https://www.mohma.org/instruments/category/radiology/x_ray_tube_coolidge/