rare chinese double jian maces with scabbard Sai

Rare pair of Chinese heavy bronze Sai Jian bar maces. The blades of thick four sided section concave to each face to form a sharp edge on each corner. The handles ending with ball finials and grips wrapped with fabric. Very rare coming with original double leather sheath, each mace weighing over 2 kgs, together nearly 4.5 kgs, each mace 63 cms long