Below is a picture which shows the accessory variation for astromech droid G8-R3, which was released in January/February 2012 in the Walmart exclusive Discover The Force series.
The first version released came with an unpainted power harness. The second and corrected version had the power harness details on both sides painted black and silver.
This variation was first discovered by Yakface.com.
Back to the G8-R3 Review