A buddy of mine and avid lens collector once mentioned the credo of all collectors: "everything comes to him, who can wait long enough...". Well, I must have waited long enough, since after some years, the brothers finally found each other..
[click on image to see a larger one]
Of course I had to test them, although the 60mm and 105mm have never been used before, MINT in makers box. Only about 25 or so have ever been made I was told, decades ago.
Measured UV-transmission (-3EV) is: 150mm: 320nm; 105mm: 315nm; 60mm: 310nm, but they do well up to 700nm (NIR)
Focus shift between UV and VIS is hardly measurable, fractions of mm only.
Stay tuned, more will follow on that fascinating subject...
More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos