Windows 8 build 8508

Windows 8 build 8508 is an RTM escrow build of Windows 8 that is referenced along with its server counterpart in  in build 8513 through to Windows 8.1 build 9448. It is also referenced in a WinJS 1.0 string found within the Windows Store infrastructure.

cversion.ini
[HostBuild] MinClient=8508.0 MinServer=8508.0