1 Yuan Pattern, 'Fat Man dollar', six characters, copper

The so-called "Fat Man dollar" takes its nickname from the rotund appearance of Yuan Shikai's portrait, produced in 1914 as the new republic sought to establish a unified national coinage to replace the chaotic mixture of provincial issues and foreign trade dollars still dominating commerce. This copper piece is a pattern — never approved for circulation — struck while the mint was evaluating compositions and die designs before settling on the familiar silver production issues.

The six-character reverse designation distinguishes it from the more common eight-character varieties. Kann's documentation of this type as 651X signals its extreme rarity; surviving examples in any condition are genuinely uncommon.