Hexagonal Shield with Clipped Top and Bottom?

Painted up some Foundry Ancient Germans that have been in my lead pile for 10 years.  I have a motley collection of shields to go with them, some Germanic, some Celtic or Roman, and even a few hoplite shields I won't be able to use.  There were two shields in the collection I couldn't identify - hexagonal shields with half circle clips taken out of the top and bottom.  I don't recognize them. Are they Germanic? Celtic? Hoping to get an ID on these...

Edit: Thanks to a response by Alan Curtis and Swampster on TMP. Turns out these are based on a few, probably ceremonial shields in Briton.  I decided to clip the "points" off the top and bottom to create regular hexagonal shields.