Watch List notes:

Germany. Cologne. Otto III 983-1002. AR Denar (15mm, 1.19g). Cologne mint. +OTTO REX, cross with pellets in each angle / S / [C]OLONIA / A [G], Cologne monogram in three lines. Dbg. 331; Hävernick 34. Very Fine, usual flat spots.
Estimate: 120 EUR