I have misread the source doc on that ZM lens, Tariq - that is northern European English for you, a different pattern of expression. According to Puts, the quality part is as you say, re Contarex.
I was researching the background to the ZM lenses, curious about them. Maybe like other former medium format users I really like slow lenses, they are so predictable and quality is never a drama, like these Contarex lenses. Apparently Zeiss formed their main principles on design in the 70s and 80s - more elements to spread correction and tolerate less stringent manufacturing quality than Leica did - and does.
Am I the only one a little curious about the Loxias? - not to be critical of CZ whom I pretty much thank every shooting day, but when you look at the later ZE/Fs and Otuses - all brilliant, at high but fair prices, then the ZM 35/1.4, they appear to be at a different level to the ex-ZM Loxias. It looks like a play for the traditional look for M users now with a Sony body, at the cost of recent developments in design. Maybe to get more differentiation from FE lenses too..we have not seen much from them yet. It seems many folks prefer the new ZM Distagon on the modded sensor, if they are prepared to pay for it.