In the 1976 Sky-Ads column:
12 INCH TELESCOPE KIT - 12" Pyrex blank, plate glass tool and abrasives, a 1/20 wave diagonal mirror, and a 72" length of Sonotube, all for $90.
Sky-Lines (PAStimes), Apr 1976
2026 pricing update: One 2026 vendor lists the 12" mirror blank for $499, but the Sonotube, diagonal, plate glass tool, and abrasives are not included.
(Elbow grease not included.)
(Provided by AstroSpheric.com)
(Provided by SolarSystemScope.com)
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