It’s based on Android 5.0 build LRX21M, same build number as the current Nexus 9 firmware.
It’s leaked pre-release firmware.
The Android 5.0 Lollipop Software Update Version D85519C is available now.
According to one developer over at xda forum, the D85519c Software Update brings the Android 5.0 Lollipop to the European LG G3 model D855. You can flash it onto a 16GB or 32GB model of LG G3 D855.
Just like the F400S19C, The D85519c is also an early Build.
LG will release the Android 5.0 Lollipop Update for LG G3 D855 in Poland.
European LG G3 owners should receive the official Android L 5.0 Software Update in a few days.
The Update will be available through LG Mobile Support Tool or LG PC Suite Software.