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Struck in 2023, this impressive one kilogram silver proof trial piece brings together two powerful emblems, the lion and the eagle, in a dramatic design that celebrates strength, courage and shared heritage. Created as a trial piece, it offers collectors a rare insight into the development of large‑format numismatic art at The Royal Mint, where designs are tested at their most ambitious scale before any final issues are considered.

The reverse presents a bold composition featuring the lion and the eagle in dynamic balance, each rendered with meticulous detail that takes full advantage of the generous one kilogram canvas. The finely engraved feathers, fur and textures are brought to life by the contrasting proof finish, with polished highlights and frosted detail creating depth and movement across the design. At this size, even the smallest features can be appreciated, from the line of each feather to the expression in the lion’s face.

The obverse carries the official portrait of His Majesty The King, finished with an intricate microdot matt effect that gives the field a refined texture while ensuring the portrait remains clear and dignified. This subtle surface treatment reflects The Royal Mint’s continuing innovation in finish and security, adding a modern touch to a piece that is otherwise rooted in traditional craftsmanship. Together, obverse and reverse show how artistry and technology work in harmony on a coin of exceptional scale.

Struck in fine silver to the highest proof standard, the 1kg format has a commanding presence in hand and on display, making it a natural centrepiece for any contemporary collection. As a trial piece, it occupies a special place in the story of the design, representing a stage that is rarely seen outside the Mint’s own archives. 

Specification

Specification Value
Denomination £500
Alloy 999 Fine Silver
Diameter 100.00mm
Reverse Designer John Mercanti
Obverse Designer Martin Jennings
Specification Value
Quality Proof
Year 2023
Pure Metal Type Silver
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