From 28th of June to 1st of July Partner 2011 exhibition took place in Belgrade (Serbia). Over 60 defence industry companies from several countries were presenting their products. Poland was represented by the Bumar Group. On its stand products of PCO S.A. were being exhibited - MU-3 Monocular, CTS-2 Thermal Sight, SWPL-1 Flight Parametres Display System, and MTN-1 Monocular among them.

Stand of the Bumar Group was visited by representatives of Serb, Slovenian and Albanian army. Meetings with representatives of weapons producers also took place.