This is a shell that is not made by machining an actual coin. It is struck (pressed) out of this
metal. Regardless of how it is made, it is a fine shell. It works well and the price is unbeatable.
As with most expanded shells, you cannot let the audience examine it (you'll need a regular locking
shell for that) but you can do a great number of tricks that will leave your audience in wonder.
Great expanded shell, low cost: buy it!