date these Zenith brochures?

[drh4683]

The second brochure must be from 1963 because Zenith celebrated its 50th year in 1968 as I have literature that says "50 years of quality 1918-1968" and also 1978 brochures that say "60 years of quality 1918-1978". The second brochure here indicates "45 year quality tradition assures highest performance standards", thus 1918+45=1963. That means the chassis we are seeing in this brochure must be a 26KC20. The first brochure is from '62 as all of those models use Zeniths first ever color chassis, the 29JC20. This is prooved because if I look up any of those model numbers in the zenith chassis index, it indicates a 29JC20 chassis. Also, I have brochures that indicate that zenith began color TV research in 1946. 1946+16=1962.