it means its silver plated - made by Walker & Hall Ltd
Without the year of manufacture, country, etc this cannot be answered. A hundred year old coin could be worth a decent amount, a newer one produced yesterday would be worth about half a cent. Silver plated items do not have a massive value, because they're only around 0.5%-3% silver, while the other 97% is common metal. Re-ask the question with more information on the coin.
Yes, tread on it then hit it with a hammer.
The value of silver plated items depends on factors such as the quality of the plating, the item's condition, and current market demand. Generally, silver-plated items are valued lower than solid silver items. It's best to consult with a reputable appraiser or check current market prices to get an accurate valuation.
An old silver buck could be worth something, you should have it appraised. It could also be melted down into silver and is worth the current price of silver times the weight of the bucket.
If it has a D or P mint mark next to Washington's wig, it's a normal coin that has been plated and is worth only 25 cents. If it has an S mint mark it's a proof coin that was accidentally spent. It may be a silver proof which would at least be worth about 3 bucks for its metal, but again it could be plated. To distinguish a plated coin from a real silver one, compare its weight to a normal quarter. If you can't get hold of an accurate scale you can make an old-fashioned popsicle stick balance. A silver coin will be a bit heavier than a standard copper-nickel one; 6.25 gm for the silver coin and 5.67 for the copper-nickel one.
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value of silver stamp holder
One common way to dissolve silver from silver plated silverware is to use a mixture of nitric acid and water. The silver plating dissolves in the acid, leaving the base metal exposed. However, this process can be dangerous and should only be done with proper safety precautions and in a well-ventilated area.
The U.S. stopped making gold $1 coins in 1889. If you have a large Morgan dollar that appears to be gold, it's actually a silver dollar that is either discolored or plated. If it's plated it'll only be worth its silver melt value, around $8 to $10. BTW, the "lady" on old U.S. coins is Miss Liberty!!!
It's only partial silver -- worth about $2.00
Old dungeon keys were made from iron, but todays keys are more likely to be brass, often plated to appear silver in color.