Hello! This livery is OM-ASB, a B757-200 that once flew for defunct company called Air Slovakia. Air Slovakia was an airline based in Bratislava, Slovakia. It existed between 1993 - 2010. At its peak, Air Slovakia operated 5 Boeing 757-200 aircraft, among other types.
Installation
Download and unzip into your 757 liveries folder.
Used works from other creators:
Modified parts of FlightFactor 757 Slat Improvement by chris_flies
I also highly recommend to use Cardajowol's RB211 engine mod.
Requested by Patryk13, enjoy :)