Nice photo and that may be the first time I’ve seen an enlisted man wearing this award in a period photo. At least in the day awarded medal arrangement shown in the photo.
To give a quick, simple response to the award I would say it’s Anhalt's version of a medal that could be compared to Prussia’s EKII. It was awarded in one class to officers, military officials, non-commissioned officers, soldiers and civilians who distinguished themselves in the field, or who gave exceptional service on the home front.