How about gold plating ALL parts to the NOS gun assemblies of 15gp22 to refurbish these rare items. Gold is chemically inert, IS a noble metal(won't oxidize or corrode over time being exposed to air), and a great conductor. I remember seeing old computer parts with gold connectors from the 70s/ early 80s surplus before trend of recycling them for gold.
Wouldn't these high quality 15gp22 gun versions have an indefinte shelf life? Research on good plating shop. here's a thought for herculean task- Has anyone thought of finding a custom glass shop to attempt to make these gun assemblies new using correct glass composition if known(ie. Pyrex, etc.) Between a custom machine shop / and glass shop with expertise maybe something made?
At the least,these TVs are worth cost of goldplating guns if sound suitable???