The name given by foreigners to the Chinese Ch'ien (q.v.) or Tsien, the tenth part of a Tael or Liang. In the modern struck Chinese silver coinage the following pieces bear the name Mace:
7 Mace 2 Candareens or Dollar (Yuan) 3 Mace 6 Candareens or half Dollar 1 Mace 4.4 Candareens or fifth Dollar
See Tael and Yuan.
Source: Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)