Although it has been tested as silver there are no silver marks evident.  4.10 gms.   A piece of silver has been added onto the back of the birds this appears to be to strengthen the length. Possibly original.   No marcasites appear to be missing.  The pin has some small kinks on it.  You are welcome to ask any questions.  I offer a money back guarantee on this item if you are not happy with your purchase and find it not as described.