The off-hand exquisite mace is a multi-tier weapon obtained from the Squeal of Fortune. It can be reclaimed from Diango for 1,000 gold at level 10 and for 10,000 gold at level 40.
Note: For a time when the various exquisite weapons were released, the certain items with off-hand variants were wieldable by free-to-play players. It was then changed so that the off-hand variants were un-wieldable by free-to-play players on 6/4/13. However, this weapon can still be obtained and used by free-to-play players.