Extremely rare brakteat, unlisted in the literature.
In Edmund Kopicki's catalog under item 141 (with the highest degree of rarity R*) we can find another representative of this Ruler - with a standing figure and ODO inscription, while in the offered one we see a rider on a horse and ODO inscription.
A very nice piece, old patina.
Sheet metal healthy, slight loss outside of the abalone shaft.
For the best collection - definitely recommended.
Obverse: prince on horseback to the right, ODO inscription to the left.