20 Sen - Agong

The Agong series ran across a remarkably long production window, surviving multiple Yang di-Pertuan Agong reigns without design revision — the coin's titular reference is to the office, not any individual ruler, which explains its unusual longevity as an uninterrupted type. Malaysia's constitutional monarchy rotates the supreme head of state among nine hereditary state rulers on five-year terms, meaning the issuing authority deliberately avoided portraiture that would necessitate frequent reissues.

KM#52 saw gradual die refinements across its production run, with earlier strikes from the Llantrisant facility differing subtly from later domestic production.