Jump to content
British Coin Forum - Predecimal.com

50 Years of RotographicCoinpublications.com A Rotographic Imprint. Price guide reference book publishers since 1959. Lots of books on coins, banknotes and medals. Please visit and like Coin Publications on Facebook for offers and updates.

Coin Publications on Facebook


The current range of books. Click the image above to see them on Amazon (printed and Kindle format). More info on coinpublications.com

predecimal.comPredecimal.com. One of the most popular websites on British pre-decimal coins, with hundreds of coins for sale, advice for beginners and interesting information.

Sign in to follow this  

1917 Halfcrown

Recommended Posts

23 hours ago, ozjohn said:

A poor choice of metals to replace sterling silver perhaps. They did not hit on the right alloy until about 1927.I think I remember that the early 50% silver coins were "treated"to migrate Ag to the surface to improve their appearance. This can be seen when they wear and take on a distinct "coppery"look. Even with the increased copper in these coins I have never seen green verdigris form on these coins even when they have been lying forgotten in a draw for years. In Australia, where these coins were stored we experience much higher humidity than the UK which is conducive to the formation of verdigris. No verdigris was found on these coins.

No, that was the second or third attempt, after awful yellowing even on virtually Unc specimens. Certainly by 1925 they were doing what you said, which is why worn 1925 halfcrowns have those ugly brown patches.

Share this post

Link to post
Share on other sites

Sorry, I think you are right. Thinking back the 1920 - 1922 were not too bad with regards to the alloy color but the strike quality was poor perhaps due to the hardness of the alloy even with the recut effigy. The poor copper color was as you say 1924 -25 and by 1927 they got the alloy right.

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this