This section is in development.  It is intended to be a menu driven survey to collect data on the different models for the purpose of determining, if possible, what variations can be attributed to what year model…or what sub-contractor, if that is the case.  Still working on specific items but will likely include variations in:

  • Aperture
  • Lettering (based on review of S&T issues, UNITRON Instead of UNITRON starts appearing in advertisements in April 1957)
  • Control and focuser knobs (based on review of S&T issues, black plastic knobs first appeared in advertisements in December 1959)
  • Cases – both material and interior design
  • Tripod spreaders
  • Cradles
  • Setting Circles