British King George VI Brass Threepence Coin
Coin/Bullion (Numismatics) · The Royal Mint, United Kingdom. Founded over 1,100 years ago, it is the primary mint for British coinage, known for exceptional precision and historical continuity.
Pattern: Standard Circulation Coinage, George VI Portrait by Humphrey Paget
Type
Coin/Bullion (Numismatics)
Maker
The Royal Mint, United Kingdom. Founded over 1,100 years ago, it is the primary mint for British coinage, known for exceptional precision and historical continuity.
Material
Nickel-brass (not silver); 79% Copper, 20% Zinc, 1% Nickel. This specific denomination transitioned from silver to nickel-brass in 1937.
Dimensions
Diameter: 21mm across flats (21.8mm across vertices). Weight: Standardised at 6.8 grams. Thickness: 2.2mm. Dodecagonal (12-sided) shape.
Description
An iconic example of British numismatic history, this nickel-brass threepence represents a move away from silver denominations due to rising metal costs and the economic demands of the war. Its unique 12-sided shape and golden hue made it one of the most beloved coins in pre-decimal Britain.
Key Features
Dodecagonal 12-sided shape; Yellow-gold brass color; George VI obverse inscription including 'IND IMP'; High-relief striking.
Material & Composition
Nickel-brass (not silver); 79% Copper, 20% Zinc, 1% Nickel. This specific denomination transitioned from silver to nickel-brass in 1937.
Finish & Decoration
Die-struck numismatic finish. Obverse features the left-facing uncrowned portrait of King George VI. The reverse (not fully visible but implied) traditionally features the 'thrift' plant (Armeria maritima).
Hallmarks & Stamps
No silver hallmarks. Coinage features: 'GEORGIVS VI D:G:BR:OMN:REX F:D:IND:IMP' (George VI by the Grace of God, King of all the Britains, Defender of the Faith, Emperor of India).
Construction Details
Machine-struck using hardened steel dies on a dodecagonal planchet. This shape was specifically chosen to help distinguish the coin from other denominations by touch.
Functional Features
Dodecagonal multi-sided edge for easy tactile identification (essential for the visually impaired and for night-time transactions during the WWII blackout era).
Handle & Grip Details
Not applicable as a coin; however, the 12-sided edge provides a distinctive grip for manual handling compared to round coins.
Craftsmanship Details
High-quality industrial die-striking. Despite being a circulation coin, the Paget portrait is regarded as one of the finest royal depictions in numismatic history for its clean lines and realism.
Authentication Indicators
Correct dodecagonal geometry; Legible Latin abbreviations consistent with Royal Mint standards; Natural wear patterns for a 75+ year old circulation coin.
Origin & Manufacturing
London or Llantrisant, United Kingdom; Manufactured by The Royal Mint using industrial steam or electric presses of the mid-20th century.
Era & Period
Mid-20th Century / World War II Era British Monarchy (House of Windsor). Historical context includes Great Britain's involvement in WWII and the dissolution of the British Raj.
Age Estimate
Circa 1937-1948 based on the 'IND IMP' (Emperor of India) title, which was removed after India's independence in 1947/1948.
Cultural Significance
A symbol of wartime and post-war Britain. It was the first multi-sided coin in British history, a design innovation that influenced modern coinage like the current UK £1 coin.
Condition Notes
Good to Very Good (Circulated). Surface shows moderate oxidation (toning/darkening typical of copper alloys), wear on the high points of the King's temple and hair, and multiple small 'bag marks' or contact dings.
Value Estimate
$0.50 - $2.00 USD for common dates in circulated condition. Rare dates (1946, 1949) or Mint State examples can command significantly higher premiums ($20 - $100+).
Care & Maintenance
For numismatic items, do not clean or polish. Wiping can cause micro-scratches (hairlines) that lower collector value. Store in a PVC-free coin flip or acid-free paper envelope.
Similar Pieces
Silver Threepence (smaller, round, .500 silver); Elizabeth II Brass Threepence (different portrait, 'IND IMP' removed); Edward VIII Brass Threepence (extremely rare, nearly identical shape).
Interesting Facts
The nickel-brass threepence was nicknamed the 'Thruppenny Bit.' It was introduced in 1937 because the tiny silver threepence was easily lost and inconvenient to handle. During WWII, the Royal Mint struggled to output enough of these to meet demand.