Timeline
1956
Questar transitions from red, silver, and blue side arm logo badges to ones with “☆Questar” in white lettering against a red background (early 1956).[1] See details.
First appearance in an advertisement of a side arm logo badge with “☆Questar” in white lettering against a red background (May).[2] See details.
1961
First advertisement with updated all-caps “QUESTAR” logo (June).[3] See details.
1963
The all-caps “QUESTAR” side arm logo badge replaces the prior “☆Questar” design (spring 1963).[4] See details.
1981
Side arm logo badges add a small “®” symbol.[5] See details.
1999
First appearance in an advertisement of the “rays” Questar logo (July).[6] See details.
Notes
1 “Early Production Questar 3-½ Telescopes: 1954 and 1955,” Company Seven, n.d., http://www.company7.com/library/questar/que54-55.html, accessed July 11, 2019.
2 Questar Corporation, advertisement, Sky and Telescope, May 1956, 327.
3 Questar Corporation, advertisement, Sky and Telescope, June 1961, 347.
4 As of January 23, 2024, the last Questar known to the author to have the early “☆Questar” red and white side arm logo badge is #3-QTZ-1697, built in the spring of 1963 (online forum posting, Cloudy Nights, January 22, 2024, https://www.cloudynights.com/topic/568428-what-year-was-my-questar-made-serial-number-code/?p=13214257, accessed January 23, 2024).
5 Ben Langlotz, online forum posting, Cloudy Nights, June 12, 2017, https://www.cloudynights.com/topic/580599-questar-design-change-history/?p=7935420, accessed February 16, 2021. As of February 16, 2021, the last Questar known to the author to have a side arm logo badge without an “®” symbol is #1-Z-8370-BB, built in 1981 (“Questar 3.5 Zerodor with Broad Band coatings,” Astromart, March 31, 2016, https://astromart.com/classifieds/astromart-classifieds/telescope-catadioptric/show/questar-35-zerodor-with-broad-band-coatings, accessed February 16, 2021).
6 Questar Corporation, advertisement, Sky and Telescope, July 1999, 25.