Windows Server 2012 Build 9200
Category: RTM
x64: https://archive.org/download/WindowsServer2012x64USA/HRM_SSS_X64FRE_EN-US_DV5.iso
Alternative: https://dl.bobpony.com/windows/server/2012/
More info: https://betawiki.net/wiki/Windows_Server_2012_build_9200
More information about Windows Server 2012: https://betawiki.net/wiki/Windows_Server_2012