Later Roman Military Standard?

[markusaurelius]

I recall seeing this item on the boards here some time ago, however can't recall if it was ever discussed unless in passing.....

Besides the Draco Standard, does anyone have any knowledge of the later Roman Military Standard? I recently looked through my Christies Guttmann collection book again and came across this item. It is listed as a Roman Triangular Standard. I have no idea where they get this from, however considering the provenance, Guttman must have had some reason for listing it as such.

Book description as follows:
A Roman Sheet Bronze Triangular Standard
(First half of Third Century)

Decorated in repousse with four registers depicting Jupiter Dolichenus and Juno Regina in the Center standing atop a bull and goat respectively, above busts of Sol and Luna, the lower register with the Dioscuri, Castor and Pollux, each holding a horse, flaming altars between them, and eagle at the apex with wreath in his beak. (40cm High x 19cm wide)



I believe before people stated that it was a Mainz Gladius Scabbard plate, however the physical dimensions do not match that. It would not be 19cm wide!!

Could this have been part of a Roman Standard, and if not, what the heck was it for? The Military symbols on it do link it to the Roman Army......

I have a higher resolution image HERE
(all be it a bit blurry to)