The 5th Malaysia Plan (RMK5) commemorative coin was launched by YAB Dato 'Seri Dr. Mahathir Mohamad on August 30, 1986. 3 types of commemorative coins were issued by Bank Negara Malaysia (BNM); 500 Ringgit of gold, 25 Ringgit of silver, and 1 Ringgit of Copper-Nickel.
The front of the coin has different designs according to the type of coin; an abstract design featuring the industrial sector for 500 Ringgit gold coins; abstract design featuring manufacturing, shipping, construction, trading and oil refineries for 25 Ringgit silver coin; and an abstract design featuring agricultural sector for 1 Ringgit Copper-Nickel coin. The word "RANCANGAN MALAYSIA KELIMA" which mean" 5th Malaysia Plan "is at the top and year "1986-1990" at the bottom of the coin. The back of the coin for all the coin is the same design with the Coat of Arms of Malaysia with the words "BANK NEGARA MALAYSIA" on the top and the value of the coin is placed at the bottom.
The coins are minted by the Singapore Mint.
The 5th Malaysia Plan (RMK5) 1 Ringgit Commemorative Coin
TECHNICAL SPECIFICATION:
Face value: 1 Ringgit
Alloy: Copper-Nickel
Diameter: 33.40mm
Weight: 16.90g
Mintage Proof: 8,000 pieces
Mintage for non-proof: 1,000,000 pieces
The 5th Malaysia Plan (RMK5) 25 Ringgit Commemorative Coin
TECHNICAL SPECIFICATION:
Face value: 25 Ringgit
Alloy: Silver .500
Diameter: 33.40mm
Weight: 35.00g
Mintage Proof: 5,000 pieces
Mintage for non-proof: 80,000 pieces
The 5th Malaysia Plan (RMK5) 500 Ringgit Commemorative Coin
TECHNICAL SPECIFICATION:
Face value: 500 Ringgit
Alloy: Gold .900 proof
Diameter: 26.16mm
Weight: 10.26g
Thickness: 1.55mm
Mintage Proof: 1,000 pieces
Mintage for non-proof: 10,000 pieces
Proof set of 3
Mintage: 2,000 sets cointain RM1, RM25 and RM500 coin
The front of the coin has different designs according to the type of coin; an abstract design featuring the industrial sector for 500 Ringgit gold coins; abstract design featuring manufacturing, shipping, construction, trading and oil refineries for 25 Ringgit silver coin; and an abstract design featuring agricultural sector for 1 Ringgit Copper-Nickel coin. The word "RANCANGAN MALAYSIA KELIMA" which mean" 5th Malaysia Plan "is at the top and year "1986-1990" at the bottom of the coin. The back of the coin for all the coin is the same design with the Coat of Arms of Malaysia with the words "BANK NEGARA MALAYSIA" on the top and the value of the coin is placed at the bottom.
The coins are minted by the Singapore Mint. Nice description here