1964 Silver Kennedy Half Dollar Popout Coin. This is a REAL 1964 Kennedy half dollar with Kennedy's head busting out......popping out of the coin. Notice the busting out design making it look like the head is busting through the coin. There are various different designs of Kennedy pop out coins. The busting out design is earlier version & not as common as with the head just popping. 1964 is the ONLY year that Kennedy half dollars were made of 90% silver.