I have examined my Brunei coins and noticed that the portrait has different in size on the 20 sen coin. The break seems to be at 2009.
See comparison between 2009 vs 2013:
2009
“Ear to ear”: 8.6 mm
“Head to A in ‘Hassanal’”: 1.8 mm
“Hat to J in ‘Haj’”: 1.2 mm
2013
“Ear to ear”: 8.8 mm
“Head to A in ‘Hassanal’”: 1.2 mm
“Hat to J in ‘Haj’”: 0.6 mm






