Brass Threepences were first minted in 1937, they ran alongside the Silver Threepences for the first few years, but from 1945-1967 they were the only Threepence struck.

Brass Threepences were the UK's first 12 sided coin, strictly speaking these coins were made from Nickel-Brass (79% Copper, 20% Zinc and 1% Nickel). The Brass Threepence weighed 6.6 grams and the diameter was 21 mm across the sides and 22 mm across the corners. 
Please see our Threepences in Brass Coins for sale below:

Threepences (Brass)

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Threepence (Brass)

1937

BU

£5.00

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Threepence (Brass)

1937

UNC

£95.00

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Threepence (Brass)

1937

FDC

£49.50

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Threepence (Brass)

1937

VF

£25.00

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Threepence (Brass)

1937

EF

£85.00

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Threepence (Brass)

1937

FDC

£22.50

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Threepence (Brass)

1938

UNC

£25.00

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Threepence (Brass)

1938

AUNC

£19.50

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Threepence (Brass)

1938

EF

£7.50

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Threepence (Brass)

1939

AUNC

£35.00

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Threepence (Brass)

1939

Fair

£32.50

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Threepence (Brass)

1940

AUNC

£22.50

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Threepence (Brass)

1941

AUNC

£7.50

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Threepence (Brass)

1942

AUNC

£7.50

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Threepence (Brass)

1943

AUNC

£7.50

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Threepence (Brass)

1944

AUNC

£9.50

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Threepence (Brass)

1945

AUNC

£15.00

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Threepence (Brass)

1946

GVF+

£49.50

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Threepence (Brass)

1946

GF+

£9.50

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Threepence (Brass)

1946

F

£5.00

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Threepence (Brass)

1946

MS-63

£595.00

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Threepence (Brass)

1946

AU-55

£325.00

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Threepence (Brass)

1948

AUNC

£49.50

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Threepence (Brass)

1949

GEF

£295.00

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Threepence (Brass)

1949

NEF

£95.00

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Threepence (Brass)

1949

GVF

£35.00

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Threepence (Brass)

1949

VF

£22.50

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Threepence (Brass)

1950

AUNC

£75.00

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Threepence (Brass)

1950

VF

£12.50

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Threepence (Brass)

1950

GF

£6.00

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Threepence (Brass)

1950

FDC

£44.00

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Threepence (Brass)

1951

AVF

£9.50

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Threepence (Brass)

1951

FDC

£49.50

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Threepence (Brass)

1953

BU

£4.00

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Threepence (Brass)

1953

FDC

£15.00

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Threepence (Brass)

1954

UNC

£7.50

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Threepence (Brass)

1955

UNC

£7.50

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Threepence (Brass)

1956

AUNC

£15.00

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Threepence (Brass)

1957

UNC

£9.50

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Threepence (Brass)

1958

AUNC

£15.00

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Threepence (Brass)

1960

BU

£4.00

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Threepence (Brass)

1961

BU

£3.00

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Threepence (Brass)

1962

BU

£4.00

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Threepence (Brass)

1963

BU

£2.00

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Threepence (Brass)

1964

BU

£4.00

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Threepence (Brass)

1965

BU

£2.00

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Threepence (Brass)

1966

BU

£2.00

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Threepence (Brass)

1967

BU

£2.00

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Threepence (Brass)

1970

FDC

£7.50