Watch List notes:

France. Uncertain Mint. Otto III 980-1002. AR Denar (17mm, 1.29g). Uncertain mint, perhaps Verdun(?). + GRA + DT + REX +, O/T+T/O cross written / S MARI А. Dbg. - , Robert (Verdun) -. Near Very Fine, flat spots. Slightly bent. Extremely Rare.
Unpublished in the major reference works, however, the reverse has similarities with Dbg 111 from Verdun.

Estimate: 1000 EUR