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These are sealed in canister Photonis ECHO grade green phosphor auto-gated 1500-1800 FOM tubes with manual gain control (MX-11769 format). Colloquially known as FMS - For Foreign Mil Sale. These are tubes we were fortunate enough to be offered by Photonis Defense as part of a new overstock. They come with a data sheet and factory warranty. They are sealed in canister. They can be converted to 10160 format as well via external gain adjustment controller removal while still maintaining their factory warranty.
Image tube sales are final. These are a factory Photonis product. We do not manufacture image tubes.