On March 16, 1981, Bank Negara Malaysia issued 3 legal tender commemorative coins in conjunction with the launching of the 4th Malaysia Plan by Tun Hussein Onn. These coins are minted using gold, silver and kupro-nickel metals in which each type is issued in the form of proof and non-proof
The front of the coin shows the third Malaysian Prime Minister's portrait, Tun Hussein Onn. At the bottom of the image is the word "TUN HUSSEIN ONN".
The back of the coin displays the Coat of Arms of the country in the center surrounded by the word "1981 * RANCANG MALAYSIA KEEMPAT * 1985" as well as the face value of the coin. For gold coins, the word "900/1000 FINE GOLD" is written under the Coat of Arms. The word "RANCANG MALAYSIA KEEMPAT" mean 4th Malaysia Plan .
All of these coins are minted by Franklin Mint, USA.
$ 1 ringgit 4th Malaysia Plan Cupro Nickel Coin
Technical Specifications:
Year: 1981
Face Value: 1 ringgit
Composition: Copper-nickel
Weight: 16.80g
Diameter: 33.35mm
Mintage: 10,000 pieces(proof); 1,000,000(non-proof)
Thickness: 2.6mm
$ 20 ringgit 4th Malaysia Plan silver coin
Technical Specifications:
Year: 1981
Face Value: 20 dollars
Composition: .500 silver
Weight: 16.90g
Diameter: 33.35mm
Mintage: 5,000 pieces(proof);100,000 pieces (non-proof)
Thickness: 2.40mm
$ 500 ringgit 4th Malaysia Plan gold coin
Technical Specifications:
Year: 1981
Face Value: 500 ringgit
Composition: .900 gold
Weight: 10.26g
Diameter: 26.50mm
Mintage: 1,000 pieces(proof); 20,000 pieces non-proof.
Set of 3 in 1:
Contains gold, silver and Copper-nickel coins
Mintage: 3,000 sets.