Monuments of Reliability - Unitron - Stonehenge ad. January. 1975. Sky and Telescope page 29
Pictured above are the UNITRON 6-inch and 4-Inch Equatorial Refractors and what is rely the most impressive astronomical instrument of all time — Stonehenge.
Despite its age and the toll of time, even today the stones still serve as a reliable predictor of celestial events. Although we hesitate to guarantee your UNITRON for 4.000 years, nevertheless we are confident that with reasonable care it will continue to give reliable performance for your lifetime and beyond. With a UNITRON there are no mirrored surfaces to deteriorate with age and no multiplicity of optical elements that will gel out of alignment with use.
Optically speaking, UNITRON has sealed the time-tested refractor design to the peek of perfection through the use of Its computer-calculated objective lenses. And while UNITRON mountings admittedly lack the massiveness of the monuments of Stonehenge, their oversized components insure the stability so necessary for serious observing.
Every UNITRON from the portable 2.4-inch models to the massive 6-inch represents the pinnacle of perfection and precision in its size. This explains why for over 20 years UNITRON has been America's most popular and prestigious refractor. Send for your free copy of the UNITRON catalog and learn about the 22 models available. UNITRON 66 NEEDHAM STREET. NEWTON HIGHLANDS, MASS 02161