According to Tamron this lens (model Z-210) was introduced in 1973 at ¥ 33,800 (about $400) price tag and had 12 elements in 9 groups. Not bad.
I couldn't find any additional information or reviews about this lens other than this manual , so I did my own tests and was very much surprised with the outcome.
Made in Japan around 1975, it's very well built and reminds me some fine Chinon/Tomioka lenses. Long but fairly light and compact (smaller than Canon 70~200 F/4 L), focus and aperture rings are smooth. But I was very skeptical about its optical performance. Tamron Zoom Macro lens from 70's??
So I tested it with X-Pro1 against some superb prime lenses: MC Rokkor-X 85 /1.7, Nikkor AI-S 105/2.5 and Minolta MD 200/2.8, all were set to about f:4.5
Sure Tamron is slower, but on eBay it costs several times less than each of those popular fast prime lenses.
Test results just blew me away.
Close if not better, huh? I retested it three time, same results.
But where this lens really shines is a macro territory. The macro range varies from 1:3 to 1:8 and ring is also very smooth.
The lens produces superb images, with low chromatic aberration and surgically sharp.
Tamron 85~210, macro mode @ 4.5
I would never expect such an excellent performance (other than bokeh) from an old Tamron zoom (!) lens. I almost feel that my test results are too good to be true and I should retest it again. But as of today this lens is a keeper.