Britannia 1/4 oz 2027 — a quarter ounce of silver with the 30 privy mark
The 1/4 oz Britannia Silver Coin King Charles III 2027 holds 7.78 g of 999 fine silver in a 22 mm coin with a 50p face value. Four of them make one troy ounce, so this size lets you buy Royal Mint silver in smaller steps than the classic one-ounce coin. The 2027 reverse carries a wave privy mark with the number 30, marking 30 years of the silver Britannia.
Technical specifications
| Parameter |
Value |
| Issuer |
The Royal Mint (United Kingdom) |
| Metal and fineness |
silver 999/1000 |
| Silver weight |
7.78 g (1/4 troy ounce, precisely 7.7759 g) |
| Diameter |
22 mm |
| Face value |
50p (GBP) |
| Year |
2027 |
| Obverse |
King Charles III — effigy by Martin Jennings |
| Reverse |
standing Britannia — Philip Nathan; “30” privy mark and 30 in the background texture |
| Security features per the mint’s 1/4 oz specification |
latent image, surface animation, micro-text |
| Status |
UK legal tender, exempt from UK Capital Gains Tax |
Why this coin
- The middle size of the series: 7.78 g of silver — a quarter of the ounce and 2.5 times the tenth ounce.
- Four coins add up to 31.1035 g, and each one can be sold on separately.
- The “30” privy mark for the silver Britannia’s anniversary sets the 2027 coin apart from earlier years.
- Latent image, surface animation and micro-text on a 22 mm coin.
- 50p face value and legal tender status in the United Kingdom.
Where the quarter ounce fits in the Britannia series
The Britannia arrived in 1987 as a gold coin and silver joined in 1997 — hence the 2027 anniversary. Silver Britannias were then struck in 958 silver; The Royal Mint moved to 999 in 2013. Alongside the ounce, the mint has struck silver fractions of 1/2, 1/4, 1/10 and 1/20 oz.
Optical security features entered the series in 2021, and the portrait of King Charles III replaced that of the previous monarch on the obverse. The 2027 coin combines both with the anniversary 30 mark.
Obverse — Charles III on 22 mm
British sculptor Martin Jennings created the portrait of King Charles III that The Royal Mint uses across the Britannia range. On the quarter ounce the same effigy sits on a 22 mm field, and the 50p face value is symbolic next to the coin’s silver content.
Reverse 2027 — the number 30 in the wave texture
The reverse follows Philip Nathan’s design: Britannia with shield, olive branch and trident, standing for protection, peace and Britain’s bond with the sea. The anniversary change is in the background: the waves that usually form the surface animation are shaped in 2027 so the number 30 can be read within them, next to a wave privy mark carrying the same number.
The Royal Mint’s specification for the 1/4 oz lists three security features: a latent image that switches from a padlock to a trident as the angle changes, surface animation, and the micro-text DECUS ET TUTAMEN, legible under a loupe.
What to check before buying
At 22 mm the 30 mark and the micro-text are very small — a loupe of at least 10x helps. The smaller size means a higher premium per gram of silver than the one-ounce coin, as minting costs are spread over less metal. The coin has a bullion finish, so light contact marks are not a defect. The UK CGT exemption does not carry over to tax rules outside the United Kingdom.
Why GoldInvest24
GoldInvest24 offers silver coins from fractional sizes upwards, sourced only from state mints and LBMA-accredited producers. Orders ship insured in discreet packaging. Check the metal value on the silver price page.
Silver Britannia sizes — where the 1/4 oz sits
| Size |
Silver weight |
Diameter |
Face value |
| 1 oz |
31.1035 g |
38.61 mm |
2 GBP |
| 1/2 oz |
15.5517 g |
27 mm |
1 GBP |
| 1/4 oz (this coin) |
7.7759 g |
22 mm |
50p |
| 1/10 oz |
3.1104 g |
16.50 mm |
20p |
| 1/20 oz |
1.5552 g |
12 mm |
10p |
All sizes are 999 fine. Weights are calculated from the troy ounce (31.1035 g).
FAQ — Britannia 1/4 oz 2027
How much does the 2027 Britannia 1/4 oz silver coin weigh?
The coin contains 7.78 g of 999 fine silver, a quarter of a troy ounce. It is 22 mm in diameter with a 50p face value.
How many 1/4 oz coins make one ounce of silver?
Four 1/4 oz coins together contain 31.1035 g of silver, the same as one Britannia 1 oz. Each coin, however, can be sold or given individually.
Does the 1/4 oz also carry the 30 privy mark?
Yes. The privy mark with the number 30 and the 30 in the wave texture appear across the 2027 silver Britannia range, including the quarter ounce.
What is the face value of the Britannia 1/4 oz?
The face value is 50p, confirming the coin as legal tender in the United Kingdom. It is symbolic — the coin's value is set by its silver content.
What security features does the Britannia 1/4 oz have?
According to The Royal Mint specification, the coin has a latent image that changes from a padlock to a trident, surface animation and the micro-text DECUS ET TUTAMEN visible under a loupe.