Unknown 5.56x45 headstamp

Does anyone know who made this 5.56x45 headstamped 09 NATO symbol 5.56? It is listed by Fuchs as an unknown fired case headstamped “60 NATO symbol 5.56”.

The only hint about its origin that I have found is that it has been reported as coming from “AmmoWorks” brand boxes. These were packed by Ammoworks, Inc. in Miami Beach, Florida, which was the same company notorious for have defrauded the US Army with obsolete Chinese ammunition. This company also imported/distributed Lithuanian 5.56x45 cartridges, but this unknown headstamp doesn’t look like a GGG headstamp made in 2009.

Thanks in advance for any help.