Bound, in excellent condition, 1977-1980, 24-27 years old, 20+ pages of vintage literature.
Dated April 1st, 1980, the original "Quantum Series Four, Six and Eight Price Catalog" for the classic maksutovs, in plastic binder, with clear mylar covers. This is an impressive glossy illustrated catalog. 5 photos of the 3 models, the Four and Six on fork mounts and tripods, the Eight on a massive germanium equatorial and pier. The price list covers the fork mounted versions, the OTA-only versions, accessories, oculars (Brandon and Clave, before the University Optics Koenigs), drive correctors, erecting prisms, etc. Spec sheet, enhanced silver coatings.
White-paper dated August 1977, "The Quantum Series of Maksutov Cassegrains". Discusses why Quantums are superior to Questars and other cassegrains: twice the diffraction limited field, high contrast, low secondary obstructions, details of the superiority of the fork mounts and tube assemblies. Why OTI was formed by two executives of Questar.
The manual "Operation and Maintenance Manual Quantum Series of Telescopes". Detailed instructions for use, the case, photography, cleaning, etc.
Single page 8 1/2 x 11 color glossy on heavy stock entitled "The O.T.I. Quantum Four Maksutov Cassegrain Telescope". This full color, full page photo was supplied by the manufacturer, three hole punched.