100 Patacas Banco Nacional Ultramarino

The Banco Nacional Ultramarino, a Lisbon-based institution with roots going back to 1864, retained its role as Macau's note-issuing authority right through the 1999 handover to China — an unusual arrangement that persisted alongside the rival Banco da China issue series introduced that same year. By 2003, BNU notes circulated in parallel with Banco da China pataca notes, a dual-issuer system that remains in force today and is almost entirely unique among Chinese-administered territories.

Thomas De La Rue's involvement continued a printing relationship with BNU that stretched back decades across multiple Portuguese overseas territories.