This is the CRT-Nikkor or Oscillo-Nikkor. It is an industrial lens that is very sharp. Note that the lens is in LTM, but there is no focusing helicoid *. You can use one of these on a Visoflex or on a Nikon SLR with the appropriate adapter, but the focusing distance is fixed.
*: I have read that MS-Optical in Japan was able to modify one of these with a focusing heicoid.
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