1939~1950 Straits Malaya 20 cents coin

Technical Specifications:
Type 1
Diameter: 23.2mm
Weight: 5.43 gm.
Composition: .750 silver
Edge: Milled
Mint: Royal Mint, UK.,
Year & mintage:
1939 -8,000,000 pcs

Type 2
Diameter: 23.2 mm
Weight: 5.43 gm.
Composition: .500 Silver
Edge: Milled
Mint: Royal Mint, UK.
Year & mintage:
1943 -5,000,000pcs
1945 - 10,000,000 pcs

Type 3
Diameter: unknown
Weight: unknown
Composition: .unknown
Edge: Milled
Mint: Bombay Mint,
Year & mintage:
1945i -only 2 pcs are known

Type 4
Diameter: 23.5 mm
Weight: 5.65 gm.
Composition: Copper-Nickel
Edge: Milled
Mint: Royal Mint, UK.
Year & mintage:
1948 -40,000,000pcs
1950 - 20,000,000 pcs