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Rare Trial Pieces including Kew Gardens 50p to be Auctioned for the First Time Ever!
Have you heard the news that for the first time in its history, The Royal Mint plan to auction rare sample coins for collectors?
Trial pieces are some of the very first samples of a new coin to be struck. They are used to set the standard for each coin issued and are carefully inspected by coin makers to ensure they meet the correct standards before striking of the new design begins.
Trial Coins Put Up For Auction
Rebecca Morgan, director of collector services at the Royal Mint, said: “This month we are delighted to offer a sample of our trial pieces at auction for the first time. Each of the trial pieces has played an integral role in creating the final coin, and offer collectors the chance to own a part of numismatic history.”
The Royal Mint have announced that collectors will have the chance to get their hands on a number of trail pieces at auction on Sunday 26th September.
Included in the auction are the coveted Kew Gardens 50p (the UK’s rarest circulation coin) and the Three Graces (a collection that sold out in 25 minutes last December).
Rare Kew Gardens 50p

Considered the ‘holy grail’ of change collecting, the Kew Gardens 50p tops the Change Checker Scarcity Index time and again. In fact, this coin is so sought-after that collectors are willing to pay well over face value to get their hands on one, with our latest eBay Tracker revealing the coin currently selling for £157 on the secondary market!
However, we always urge buyer caution when purchasing a Kew Gardens 50p, as there are a number of fakes out there to be aware of. Find out how you can spot the fake Kew Gardens 50ps here.
1994 Mayflower £2 Trail Piece

Rare trial pieces have been seen before, often becoming very sought-after amongst collectors…
In 1994, ahead of the introduction of the UK’s first bi-metallic coin – the £2 – The Royal Mint created a trial piece. This was used by The Royal Mint to test the minting process of the new coin and to help the automatic vending industry re-calibrate their machines in preparation.
The trialled reverse design features a three-masted sailing ship. Although the ship is not named, it is likely to be the Mayflower, which set sail from Plymouth to America to establish the first permanent New-England colony. The outer ring bears the inscription Royal Mint Trial with the date, 1994.
There were just over 4,500 packs of this trial £2 issued and as the coin design was never released into circulation, it has become an incredibly rare example of a bi-metallic £2 coin.
If you own one of these £2 trial pieces you can consider yourself very lucky!
But with the upcoming auction set for the 26th September, we’re sure collectors will be excited at the chance of getting their hands on the trial piece coins offered by The Royal Mint, including that sought-after Kew Gardens 50p which we’re sure will be incredibly popular.
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Computer pioneer, Charles Babbage, celebrated on an Innovation in Science 50p…
Charles Babbage was an English mathematician and inventor who originated the concept of a digital programmable computer. He is even considered by some the ‘father of the computer’!
In 2021, the year marking 150 years since his passing, The Royal Mint issued a UK 50p as part of their Innovation in Science series.
2021 UK Charles Babbage 50p
The reverse of the Charles Babbage 50p was created by Nigel Tudman and Jas Bhamra, and features a design honouring Babbage’s legacy, linking his machinery to the digital age. They used a combination of traditional minting skills and modern technology to create the striking design.
The Pioneer of Computing

Boasting an impressive career in calculus, astronomy, and arithmetics , Charles Babbage held the title of Lucasian Professor of Mathematics at Cambridge University.
The 1820s saw Babbage’s development of his ‘Difference Engine’, which was a machine that could perform mathematical calculations. Initially constructed as a six-wheeled model, it was later developed into a bigger, better, and more complex machine – Difference Engine 2.
However, his fame as a computer pioneer largely came from his invention, the Analytical Engine. It could perform any arithmetical calculation using punched cards, as well as a memory unit to store numbers – the fundamental components of today’s computers.
Babbage’s ideas were well ahead of their time, making him a perfect addition to The Royal Mint’s Innovation in Science series.
The Innovation in Science Series
This exciting series kick-started back in 2019 with the issue of the Stephen Hawking 50p.
2019 Stephen Hawking 50p
In 2019, less than a year since his death, The Royal Mint released a Stephen Hawking 50p coin, honouring his works as one of the most influential physicists of the modern age.
He became the very first person to be celebrated in The Royal Mint’s Innovators in Science series and only the third person to be commemorated on a coin within a year of their death (the others being Winston Churchill and the Queen Mother!)
The reverse of the coin, designed by Edwina Ellis, features a stylised black hole and the inscription ‘Stephen Hawking’ . It also shows the Bekenstein-Hawking formula, which describes the thermodynamic entropy of a black hole!
2020 Rosalind Franklin 50p
In the year that would have marked her 100th birthday, The Royal Mint released a 50p celebrating the life and crucial work of Rosalind Franklin, the first female scientist to be commemorated on a UK coin.
David Knapton’s striking design of this coin, features a depiction of Rosalind Franklin’s X-ray, ‘Photograph 51’, which revealed the helical structure of DNA, in her laboratory at King’s College, London.
One of Britain’s greatest scientists, Franklin made a crucial finding to the discovery of the double-helix structure of DNA.
2021 John Logie Baird 50p
It’s hard to imagine life without television but back in the early 1920s, it was a complete unknown.
That was until John Logie Baird successfully produced televised objects in outline in 1924, transmitted recognisable human faces in 1925, and demonstrated the televising of moving objects in 1926.
Issued in 2021, to celebrate the life and works of the ‘Father of Television’, the design of this 50p coin features key milestones from Baird’s life, presented between the lines of transmission radiating from the centre of the coin.
Do you have any of the Innovation in Science coins in your collection? Let us know in the comments!
How much is your A-Z 10p worth now? August 2021 update!
The A-Z of Great Britain 10p coins have been a firm favourite with collectors since they were first released in 2018, with 26 Quintessentially British designs capturing the public’s imagination.
Unsurprisingly, some designs are proving more popular than others, but which ones are likely to fetch the most on the secondary market?
We’ve done the hard work for you by taking a look at which A-Z 10p coins are selling for the most on eBay and which ones you should be looking out for.

The ones to watch…
If you’re lucky enough to have the ‘R’ for Robin 10p in your collection, you might want to keep hold of it, as it currently sells for around £6.99 on the secondary market – which is a pretty hefty return on its face value!
Equally, the B for Bond 10p, which has proven time and time again to be popular with collectors, is currently selling for around £6.25 on the secondary market sites.
These are some really big prices to pay for these A-Z 10p coins and it’s certainly higher than we’d expect to see!
We would always suggest caution and user discretion when buying and selling on eBay. Remember you can always use our 5 eBay Buying Tips which are on our blog, to make sure you get the most out of your money.
Dipping slightly in price, we see the L for Lochness Monster 10p selling for around £4.20 on eBay and the N for NHS fetching a similar price too.
How many A-Z 10p coins are out there?
In 2018, it was confirmed that 220,000 of each design were issued for circulation, but it wasn’t until 2021 that we saw the 2019 mintage figures confirmed.
Collectors who have managed to find the 2019 dated Q, W, Y, Z, and R 10p coins will be delighted to see that these have a lower mintage than the other 21 designs from that year.
The 2019 World Wide Web, Yeoman Warders and Zebra Crossing 10p coins all have a mintage of JUST 63,000! When you compare that to the rarest 50p in circulation, the Kew Gardens 50p, which has a circulating mintage of 210,000, it puts into perspective just how rare these 10p coins are.
Interestingly, the Robin 10p, which currently has the highest median sold price out of all of the A-Z 10p coins, has a combined 2018 and 2019 mintage of just 284,000, compared to 304,000 for the majority of the other coins!
These coins are notoriously tricky to find, but have you been lucky enough to come across any in your change? Let us know in the comments below.
Secure the ultimate commemorative for Change Checkers who are collecting all of the A-Z 10ps
The A-Z of Great Britain Collector’s Medal is the ultimate commemorative for Change Checkers who are collecting all of the A-Z 10ps – a total of 26 designs all issued in 2018!
Your medal will be protectively encapsulated and is the perfect momento for Change Checkers collecting the A-Z of Great Britain 10p coin Series.