1. Copper alloy 20 qirsh of `Abd Allah b. Muhammad/The Mahdi, Umm Durman/Omdurman, 1312, 12 H. 2005.28.1 Creator: Authority: `Abd Allah b. MuhammadAuthority: The Mahdi Geographic region: Mint: Umm DurmanMint: OmdurmanRegion: NE Africa Time period: Mahdid--Sudan Medium: Copper alloy Extent: Diameter: 35.0Weight: 19.366