Hello, I am wondering if there is any silvered variants of coins, such as for jewelry purposes or other reasons. I have a picture of a 1920 silvered penny obverse. (this is not my coin I got it from a friend)
Base metal coins covered with silver or gold are quite common. Any jeweller in the world will offer gold, silver, or bronze cladding of objects as a service. And these 'objects' can be anything - from baby's first shoes to coins.
Reasons to cladd coins can be different - mostly to make them nicer and more special. I also read that in some country's there is a tradition of donating golden coins to newlyweds, which is now symbolically fulfilled with gilt common coins.
Since this cladding is done 'post mint', there is little numismatic interest in these coins - nice to have as an oddity. Orthodox collectors may even consider it as 'post mint damage'. Also, the amount of precious metal (gold, silver) added by cladding is very little - is doesn't make the coin very 'valuable' for that reason, either.