| Issuer | Brunei |
| Year | 1977-1993 |
| Type | Standard circulation coin |
| Value | 20 Sen |
| Currency | Ringgit / Dollar (1967-date) |
| Composition | Copper-nickel (75% Copper, 25% Nickel) |
| Weight | 5.66 g |
| Dimensions | 23.6 mm |
| Thickness | 1.45 mm |
| Shape and Technique | Round Milled |
| Orientation | Medal alignment ↑↑ |
| Engraver(s) | Christopher Ironside |
| In circulation to | |
| Reference(s) | KM#18, Schön#21 |
| Obverse description | Sultan and Yang Di-Pertuan of Brunei Hassanal Bolkiah facing right |
| Obverse script | Latin |
| Obverse lettering | SULTAN HASSANAL BOLKIAH · |
| Reverse description | A vertical oblong pattern based on local design and said to represent a tree, year of issue, and denomination. `Government of Brunei` |
| Reverse script | Latin |
| Reverse lettering | KERAJAAN BRUNEI 1983 · 20 SEN · |
| Edge | Milled |
| Mint | Royal Mint, Llantrisant, United Kingdom (1968-date) Singapore Mint, Singapore |
| Mintage | 1977 - - 1 200 000 1978 - Royal British Mint - 720 000 1979 - - 1 060 000 1979 - Proof - 10 000 1980 - - 1 540 000 1981 - - 2 140 000 1982 - - 120 000 1983 - - 1 350 000 1984 - - 750 000 1984 - Proof - 3 000 1985 - - 1 000 000 1985 - Proof - 1986 - - 2 639 000 1986 - Proof - 7 000 1987 - - 2 400 000 1988 - - 560 000 1989 - - 500 000 1990 - - 720 000 1991 - - 725 000 1992 - - 2 432 000 1993 - - 2 521 000 |
| Catalog ID | 1936882610 |
| Comments |
