This is an uncertified 'raw' coin.

1962 Silver Franklin Half Dollar Proof Coin

Designer: John R. Sinnock, the reverse adapted from a design by John Frederick Lewis

Diameter: 30.6 millimeters

Metal content: Silver - 90%, Copper - 10%

Weight: 12.500 grams

Edge: Reeded

Mintmark: None (for Philadelphia) centered above the bell on the reverse

Stock Photo seen here.