Here are drawings of two surviving maces:
366. Iron mace-head, 11th to 13th centuries AD, Iranian, British Museum no. 838.89, London.
388A Iron mace-head, 12th-13th centuries AD, Iranian, Heeramaneck Galleries, New York (Grab P).
Maces seem to have become symbols of leaders, perhaps influenced by the Shahmana text. The bull- (or cow-) headed mace in the Shahmana is likely to have influenced the use of animals on these. I'll have a look at 14th-15th century manuscripts for maces.
The symbolism in the Sasanian and earlier periods may have been quite different.
Druzhina
Seljuk Illustrations of Costume & Soldiers