A British 1920 silver Maundy Twopence (KG V), uncirculated and in absolute mint condition could fetch up to £12 GBP. If it has been circulated but still in good condition, it might fetch anything up to £7 GBP.
A reputable coin dealer will be able to give a more accurate valuation.
One Pound GBP in 1920 had the purchasing power of about £26.75 GBP today.
The Franco-British Rhine - 1920 was released on: USA: 11 April 1920
Farthings were made from bronze. If your Farthing appears to be gold, somebody has probably gold plated it. Modified coins have no collector value.
Such a coin does not exist. The British Half-Farthing was last issued for circulation in 1856.
If you refer to the 1920 British Shilling, it is not rare.
British Industries Fair was created in 1920.
British Humane Association was created in 1920.
British Socialist Party ended in 1920.
The British Shilling has never been made from gold, and has always been made from silver. From 1920 onwards, the Shilling and all other British silver coins, were debased from Sterling silver (92.5%) to 50% silver.
Israel didn't exist in 1920. That area was called Palestine and was ruled by the British.
They didn't mint 1920 US silver dollars.
The British-Swiss Chamber of Commerce was created in 1920.