@marhko
I think that you're maybe confused because Garmin issues only the Unicode CN map version in EU for modern [Cyrillic-capable] Nuvis, concurrently with the 'non-unicode' NT for other devices not capable of reading Cyrillic and some other language characters. In the NA market it issues solely the non-unicode CN version and additional files because the same demand from Cyrillic etc users does not exist as it does in EU.
However, your 42 [like all other Cyrillic capable-units] operates perfectly with either type of map. If you need more info:
[Only registered and activated users can see links. Click Here To Register...] and
[Only registered and activated users can see links. Click Here To Register...].
If you need even more info post elsewhere because this is OT here as catymag points out. ;))