It signifies it is a rolled gold necklace (ie a form of gold plated necklace) with the base metal being a mix of Nickel and Silver.dose it have any value?
Modified coins have no collector value. Any value would be associated with the necklace.
Online sites that have stamp value guides include Stamp Collecting Resources, Stamps Site UK, Hobbizine, Find Your Stamps Value, Stamp Treasures and Mystic Stamp.
A modified coin would be valueless. Any value would be associated with the necklace.
Modified coins have no collector value. Assuming that the coin has not been damaged or altered in any way by the jewellery making process, the Sovereign might get anything up to £165 GBP. If the coin has been damaged or altered, it should get the current bullion value of the gold it is made from.
It depends on the necklace. The steel itself has very little value, but depending on the design, the designer, etc. it could be worth some money based on that.
That will depend on the specific stamp. Some of the varieties of commemoratives and even definitives with specific markings and perforations can be of moderate value. Consult a postage stamp catalog to find out.
Consult a postage stamp catalog to identify the stamp. It will also provide a general value for the item.
Such a coin is fairly common and is not made out of any precious material and since it is in a necklace, there is no coin collector value. Any value would come from the necklace itself, most likely scrap silver/gold if the chain or bezel was made out of that. In short, the coin is worthless and the only value comes from the necklace part itself.
No
If you are certain that it is from 1919, then it must be Scott Catalogue number OX21. The catalogue value is $0.20. That is the minimum value for any stamp listed. Therefore, the true market value for the stamp is very small - maybe around $0.05-0.10.
No they won't get valued