GE image orthicon video tube very Large Part Number Z7866, Made from 1946-68

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GE image orthicon video tube very Large Part Number Z7866,  They were Made from 1946-68, this one I think says 66/34, in great shape for age, very neat and LARGE, was used by NASA in the 60's because of it's great resolution and night sensitivity.
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The image orthicon (sometimes abbreviated IO), was common in American broadcasting from 1946 until 1968.[97] A combination of the image dissector and the orthicon technologies, it replaced the iconoscope in the United States, which required a great deal of light to work adequately.[98]
The image orthicon tube was developed at RCA by Albert Rose, Paul K. Weimer, and Harold B. Law. It represented a considerable advance in the television field, and after further development work, RCA created original models between 1939 and 1940.[99] The National Defense Research Committee entered into a contract with RCA where the NDRC paid for its further development. Upon RCA's development of the more sensitive image orthicon tube in 1943, RCA entered into a production contract with the U.S. Navy, the first tubes being delivered in January 1944.[100] RCA began production of image orthicons for civilian use in the second quarter of 1946.[66][101]