100 Ringgit

Brunei's polymer series, first introduced in 1996, made the sultanate one of the earliest Southeast Asian issuers to adopt Guardian substrate from Note Printing Australia — ahead of most of its regional neighbours. The 100 Ringgit is the highest denomination in that polymer run, which gives it a different circulation profile than the lower values: these moved through commercial banking channels far more than through everyday retail use, limiting the wear patterns typically associated with high-turnover notes.

Pick 29 spans nearly a decade of issue across the 2004–2013 window, with signature variations tied to successive AMBD directors. Worth checking before cataloguing.