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