Error Reverse: the rim cud, where part of the die that forms the rim of the coin breaks away and any struck coins have a raised element that extends around part of the rim.

The Malaysian ringgit is divided into 100 sen. The ringgit is issued by the Central Bank of Malaysia. On 12 June 1967, the Malaysian dollar replaced the Malaya and British Borneo dollar. The ringgit and sen were officially adopted as the sole currency of Malaysia on the 28 August 1975.
Minting of the first sen series ended in 1989, when the second series was introduced. The older coins remain legal tender as of 2019, but have steadily declined in number and are seldom seen in circulation in Malaysia.
The Yang di-Pertuan Agong (He Who is Made Lord'), simply the Agong, and unofficially known as the King of Malaysia, is the constitutional monarch and head of state of Malaysia. The office was established in 1957, when the Federation of Malaya - Malaysia gained independence from the United Kingdom. Malaysia is one of the world's few elective monarchies.
The 16th and current Yang di-Pertuan Agong is Abdullah of Pahang, replacing Muhammad V of Kelantan, who abdicated on 6 January 2019. Abdullah was elected on 24 January 2019, by the Conference of Rulers and took the oath of office and was sworn in at the Istana Negara on 31 January 2019.
The Yang di-Pertuan Agong's queen consort is known as the Raja Permaisuri Agong, currently Tunku Azizah Aminah Maimunah Iskandariah. The royal couple are styled in English as "His Majesty" and "Her Majesty".
OBVERSE: Value divides date below Hibiscus flower blossom (Binomial name: Hibiscus rosa-sinensis), the national flower of Malaysia
Lettering: BANK NEGARA MALAYSIA 10 SEN 2002
Translation: Malaysian National Bank designers
Designer: Bank Negara Malaysia
REVERSE: Congkakm, a popular game of logic played throughout Asia, Africa and the Americas, with many adaptations. Known elsewhere as mancala, the version commonly played in the Malay Archipelago requires two players to share a wooden board with one row of seven holes along each side, and one bigger hole at either end.
Translation: Malaysian National Bank designers
EDGE: Reeded
Mint: Mint Department of Bank Negara Mint, Shah Alam, Malaysia
Mintage in 2002 290 451 948
Country                        Malaysia 
Head of State                  His Majesty Yang di-Pertuan Agong
Period                              Federal elective constitutional monarchy (since 1963)
Type                         Standard circulation coin
Years                            1989-2011
Value                          10 Sen
Currency                      Ringgit (since 1967)
Composition              Copper-nickel
Weight                          2.84 g
Diameter                   19.4 mm
Thickness                    1.37 mm
Shape                      Round
Orientation                  Medal alignment ↑↑
References                  KM# 51, Schön# 93