From my garden. Information on this conifer is lacking. It seems to have a fastigiata growing habit as all branches sweep upwards. I am told it originates from the lower slops of the Tatry mountain range. Tatry is the name of the Alpine mountain range which straddles the Slovak-Polish border.
Looks like it has a needle cast or other problem producing a similar effect (partly dead needles). P. mugo also occurs in the Tatra Mountains, perhaps that's actually where this one came from, with a search using that spelling being able to produce some background information. Either way (Tatra or Tatry), it may be that someone grew some seed collected there and this is a seedling from that batch, identified as having originated there but not actually selected and named as a cultivar. It might have started out labeled "ex Tatra" or "seed from Tatra Mountains" - whatever - and then gotten transposed to P. mugo 'Tatra' by mistake, as it changed hands along the way.
I'm talking about the dead sections on the live needles, not the all-dead needles. http://images.google.com/images?hl=en&ie=UTF-8&q=pine+needle+cast&um=1&sa=N&tab=wi