Watch List notes:

Germany. Cologne. Otto I 936-973. AR Denar (15.5mm, 1.29g). Cologne mint. +[ODDO I]MP+AVG, cross with pellets in each angle / S / [C]OLONI[I] / A, Cologne monogram in three lines. Hävernick 64; Dbg. 334. Very Fine, slightly wavy flan, flat spots.