I do not know what you mean by "mounted". If the coin is mounted in a piece of jewellery or otherwise altered, it has no collector value, only the bullion value of the gold. Modified coins have no collector value.
If the coin is mounted in a presentation box or some other protective packaging -
A British 1918 gold Half-Sovereign (George V)(minted in Perth - mintmark = P), uncirculated and in absolute mint condition could fetch up to £2,650 GBP. If it has been circulated but still in good condition, it might fetch up to £225 to £1,500 GBP.
The values quoted are the best possible for the best specimens in their grades, but may be significantly lower due to varying demand for the coin and the prevailing economic climate. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.
Three Mounted Men - 1918 was released on: USA: 7 October 1918
125 USD
$30
125 USD
Three Mounted Men was created on 1918-10-07.
German General Ludendorff mounted his assault at the joint between the British and French lines.The attack took place on the morning on March 21, 1918.
Oblin The Switzerland of British Columbia - 1918 was released on: USA: 20 May 1918
Trinidad British West Indies - 1918 was released on: USA: 21 April 1918
Barbados British West Indies - 1918 was released on: USA: 13 October 1918
changesi n british foreign policy in 1918-39
The value of a 1914-1918 coin can vary depending on various factors such as the condition of the coin, rarity, and demand from collectors. It is recommended to consult with a professional coin dealer or appraiser to determine an accurate value for your specific coin.
One Pound GBP in 1918 had the purchasing power of about £32.41 GBP today. NOTE - This historical conversion is the result of many calculations and considerations by a purpose designed program for which I can take no credit. The resulting answer should only be regarded as an approximation.