was it a 1.7...I'm remembering back to '86 and I don't know what I had for breakfast....hold on do some research.....

op: hm well. Just make sure, 1.4 or 1.7(! u was right) that's it's on of the old ones, pre 1990's, because when contax went bust, Zeiss handed over the making to Cosina, and from then on your buying a zeiss branded cosina which is ok, but no better than any other standard prime.
Hi Rocky,
I have collected cameras for many a year and one of my favourites was Zeiss. Zeiss made a set of spectacularly good lenses for their sister company, Zeiss Ikon, for their Contarex SLR.
When Zeiss Ikon folded these lenses looked like they were going to waste. The owner of Yashica was a big Zeiss fan and did a deal with Zeiss to license tha Contax name, which had been the Zeiss rangefinder, not SLR, but had a longer reputation than the Contarex, and to make available the Contarex lens designs in their Yashica mount.
The higher volume lenses were made in Japan and the fast aperture low volume lenses in Oberkochen. Zeiss did install a Zeiss QC department in Japan.
The current Zeiss volume lenses are still made in Japan, at the same factory as before AFAIK, perhaps Cosina is part of Yashica??? Only the lower volume speciality optics are still being made in Germany, at similar prices to Leica.
I still have my Contarex BTW and a few lenses. I have considered getting the Metabones Contarex to Fuji X adapter so I can use them again but I rather suspect the Fuji lenses match the sensor better than any older lens.
FWIW!