1963 Penny Appears To Be Silver?

Looks like a typical plated cent. After the mint.

Part of the design, usually the rim would be cut off actually because a dime planchet is smaller than a penny planchet and the coin would weigh less. Silver dime planchets (made before 1965) weigh 2.5 grams, and copper-nickel clad planchets (made since 1965) weigh 2.27 grams.

In all likelihood, you have a penny that has been plated with silver, pewter, or mercury. chemistry experiments used hot sodium hydroxide solution as an example to plate cents

Plated

to the CCF and