A very rare denomination.
Cross obols, against the background of their larger "brothers", denarii, are a denomination minted in markedly lower mintages, found only occasionally at auctions. Here, additionally, being their very difficult to acquire type.
A type with an obverse depicting a gauntlet and a flag, in a variety with a flag on a cross, with the pennant to the left.
Dated to the last quarter of the 11th century.
Silver, diameter 10 mm, weight 0.24 g.