Niewmismatic Error Coins

Silver Medallion Of The Installation Of Yang Di-Pertuan Agong 1980
The Installation Ceremony of the Malaysian Sovereign is the Malaysian equivalent of a coronation, marking the beginning of the reign of the Yang di-Pertuan Agong as the Malaysian head of state.

The ceremony is a hybrid of ceremonies found in Malaysia's nine royal states, which all have one similarity: all do not use a crown. Instead, a special headdress know as the Tengkolok Diraja (Royal Headdress) is used, except in Johor where the Sultan is crowned.
The Installation of the Yang di-Pertuan Agong and his consort, the Raja Permaisuri Agong, is often held months after the Sovereign's election by the Conference of Rulers at the Istana Melawati in Putrajaya. The installation is strictly ceremonial, as the Yang di-Pertuan Agong immediately takes office upon the expiry of the previous term, or in case of a vacancy, upon election. A simple inauguration ceremony is held on the day the Yang di-Pertuan Agong begins his term, in which the Sovereign takes the oath of office.
Guests, as possible would wear the Ceremonial Dresses (for government officials and MP's), the No.1 Uniform for members of the Malaysian Armed Forces, the Royal Malaysian Police, and other uniformed forces, morning coats, national dresses for diplomats and the Malaysian national dresses, the Baju Melayu for men and the Baju Kurung or Baja Kebaya Labuh for women. Being a Collar Day, medals and order ribbons are worn by those who are required and entitled to wear them by law.

The HRH Sultan Haji Ahmad Shah Al-Musta'in Billah Ibni Almarhum Sultan Abu Bakar Riayatuddin Al-Mu'adzam Shah is the fifth Sultan of Pahang of Pahang, and also served as the seventh Yang di-Pertuan Agong of Malaysia from 26 April 1979 to 25 April 1984.
As the Yang di-Pertuan Agong from 1979 to 1984, Sultan Haji Ahmad Shah was automatically designated under constitutional provisions as the Supreme Commander of the Malaysian Armed Forces, holding the rank of the Field Marshal of the Royal Malaysian Air Force, Admiral of the Royal Malaysian Navy and Field Marshal of the Army.
He has been awarded :

Honours of Pahang
Grand Master and Member (DKP) of the Royal Family Order of Pahang (since 24 October 1977)
Grand Master and Member 1st class (DK I) of the Family Order of the Crown of Indra of Pahang (since 1974)
Founding Grand Master of the Grand Royal Order of Sultan Ahmad Shah of Pahang (SDSA, since 23 October 2010)
Founding Grand Master and Grand Knight of the Order of Sultan Ahmad Shah of Pahang (SSAP, since 24 October 1977)
Grand Knight - SIMP.svg Knight Companion (DIMP), Grand Knight (SIMP) and Grand Master of the Order of the Crown of Pahang (since 1974)

National and Sultanal Honours
Malaysia (as Yang di-Pertuan Agong, 29 March 1979 – 25 April 1984)
Recipient of Order of the Royal House of Malaysia (DKM)
Recipient (DMN) and Grand Master (1979-1984) of the Order of the Crown of the Realm
Grand Master (1979-1984) of the Order of the Defender of the Realm
Grand Master (1979-1984) of the Order of Loyalty to the Crown of Malaysia
Grand Master (1979-1984) of the Order of Merit of Malaysia
Grand Master (1979-1984) of the Order of the Royal Household of Malaysia
Pahang Silver Jubilee medal (1957)

Johor :
First Class of the Royal Family Order of Johor (DK I)
Knight Grand Commander of the Order of the Crown of Johor (SPMJ)
Sultan Ismail of Johore Coron Medal (1960)

Kedah :
Member of the Royal Family Order of Kedah (DK)

Kelantan :
Recipient of the Royal Family Order or Star of Yunus (DK)

Negeri Sembilan :
Member of the Royal Family Order of Negeri Sembilan (DKNS)

Perak :
Recipient of the Royal Family Order of Perak (DK, 6.5.1975) -- currently
Grand Knight of the Order of Cura Si Manja Kini (the Perak Sword of State, SPCM, ) with title Dato' Sri—currently

Perlis :
Recipient of the Perlis Family Order of the Gallant Prince Syed Putra Jamalullail (DK)

Selangor :
First Class of the Royal Family Order of Selangor (DK I, 16.7.1987)

Terengganu :
Member first class of the Family Order of Terengganu (DK I)

Foreign Honours
Argentina :
Grand Cross BAR.png Grand Cross of the Order of the Liberator General San Martín
Brunei :
Recipient of Royal Family Order of the Crown of Brunei (DKMB)
Senior (Laila Utama) of the Family Order of Brunei (DK)

Kuwait :
Collar of the Order of Mubarak the Great

Romania :
Star of the Socialist Republic of Romania 1st class (25.11.1982)

Saudi Arabia :
Badr Chain (1982)

South Korea :
Grand Order of Mugunghwa

United Kingdom :
Queen Elizabeth II Coronation Medal (1953)