Mixed Media / drawing: This is a redesign of a motif from an archaological find (a buckle/brooch).
Updated 2019-8-24: Extra photo: Two similar designs
Huginn and Muninn. This was apparently a very fashionable design once, as it exists in quite a few variations in the Archaeological record. Read on for two examples and reconstruction grid....
Now I would use a slightly different grid. However, this is the one I used for the task.