Should You Clean Old Silver Coins? How Condition & Damage Affect Value
When examining old coins and collections, I always consider more than just their age or silver content. The condition of a coin, its original surface and its appeal to collectors can all influence its value.
One thing I always recommend is not cleaning or polishing old coins before having them assessed. A coin doesn't have to look shiny to be valuable, and attempts to improve its appearance can sometimes do more harm than good.
The following two silver coins are useful examples of how natural toning, scratches and surface condition can affect collector interest.
The 1935 George V Rocking Horse Crown - 50% Silver
The 1935 British Crown was issued during the reign of King George V to mark his Silver Jubilee. It features the King's portrait on one side and a distinctive design of St George on horseback on the other, often referred to as the Rocking Horse Crown.
Although it's a silver coin, it contains 50% silver, rather than the higher silver content found in some earlier British coins.
1935 George V Crown showing the King's portrait and visible surface toning.
Reverse of the 1935 Crown, featuring the distinctive St George on horseback.
Over time, silver coins can develop darker areas or changes in colour, commonly called toning or tarnish. This doesn't automatically mean a coin is damaged. Collectors sometimes appreciate original, attractive toning because it reflects the coin's history and can indicate that its surface hasn't been aggressively polished. However, not all discolouration is desirable. Poor storage, moisture or contamination can also affect a coin's appearance and condition.
My advice is to leave the surface untouched rather than trying to make an old coin look new.
The 1969 Kennedy Half Dollar - 40% Silver
The 1969 Kennedy Half Dollar is an American coin featuring President John F. Kennedy on the front and the presidential seal on the reverse.
The 1969 Kennedy Half Dollar contains 40% silver, unlike standard circulating Kennedy Half Dollars minted from 1971 onwards, which contain no silver.
This particular example is useful for showing how scratches and visible surface marks can influence a coin's condition.
1969 Kennedy Half Dollar showing a visible scratch above the word “TRUST”. Surface damage like this can affect collector appeal.
Reverse of the 1969 Kennedy Half Dollar, showing the presidential seal and visible surface discolouration.
A noticeable scratch can reduce a coin's desirability to collectors, particularly when it affects a prominent part of the design or lettering.
The depth, position and severity of a scratch all matter. Professional grading services may treat significant scratches as damage, although the effect on value varies from coin to coin.
Importantly, a scratch doesn't remove the coin's underlying silver content. A damaged coin may still have precious-metal value even if its collector appeal is reduced.
Why Cleaning Old Silver Coins Can Reduce Their Value
It's understandable to think that an old coin might be worth more if it looks bright and shiny. Unfortunately, that isn't necessarily the case.
Rubbing a coin with a cloth, using silver polish such as Silvo, or attempting to remove tarnish with abrasive products can leave very fine scratches known as hairlines. These marks can permanently alter the original surface and reduce the coin's appeal to collectors. Chemical cleaning can also change a coin's appearance. Inappropriate or excessive treatment may affect its surface characteristics and original lustre. Once the original surface has been damaged, it generally cannot be restored simply by polishing it again.
My recommendation is simple: don't clean, polish or attempt to remove tarnish from old coins before having them assessed. This applies whether you have a single silver crown, an inherited coin album or a larger collection.
These two collections show how differently old coins can age, with some developing dark tarnish, discolouration and surface marks. I always recommend leaving them untouched until they've been properly assessed.
Collection of old coins showing different levels of natural toning, tarnish and surface wear.
Older coins showing dark tarnish and discolouration, illustrating why cleaning should be avoided before assessment.
Do these coins look familiar to you? Perhaps you have something similar tucked away in a drawer or cupboard. Send me a quick photo on WhatsApp for a free initial opinion, with no obligation to sell.
How I Assess Old Coins and Collections
When looking at old coins, I consider several factors rather than judging them simply by how old or shiny they appear.
These include:
Metal content: Whether the coin contains gold, silver or another metal, and its precious-metal content.
Date and mint mark: Certain years and mint marks can be more sought after than others.
Rarity and demand: Some coins attract additional interest from collectors.
Condition: Wear, scratches, cleaning damage and other surface issues can affect collector value.
Originality and eye appeal: An attractive, original surface can be an important part of a coin's appeal.
It's also worth understanding the difference between silver value and collector value.
Some coins are primarily valued for their precious-metal content, while others may be worth more because of their rarity, condition or collector demand. That's why I prefer to examine coins in their existing condition before making an assessment.
Have Old Coins or a Collection You'd Like Me to Look At?
If you have inherited a coin collection, found old silver coins or have coins you're considering selling, there's no need to clean them first.
At Antiques of Sussex, I offer free, no-obligation assessments of coins and medals across East and West Sussex, with appointments at my Haywards Heath office and home visits available.
You're welcome to send me a few clear photographs on WhatsApp for an initial opinion.
You can also read more on my Coins & Medals page.
Get in Touch
WhatsApp:
Phone: 07586 402927
Email: info@antiquesofsussex.co.uk
About the Author
Wayne
Founder, Antiques of Sussex
30+ Years’ Experience
With 30+ years' experience buying and valuing gold, jewellery, silver, coins, watches and antiques across Sussex, I share practical guidance based on the items I personally assess and purchase from clients.
