
Based on established numismatic data, as the provided context is insufficient for a comprehensive answer, a 1967 Kennedy half dollar has a metallic composition of 40% silver and 60% copper. This type of coin is often referred to as "silver-clad." The United States Mint produced Kennedy half dollars with this specific silver content for a limited period, from 1965 through 1970, as a measure to reduce the amount of precious metal in circulating coinage due to rising silver prices.
The total weight of a 1967 half dollar is 11.5 grams. With a 40% silver composition, the actual silver weight (ASW) within the coin amounts to approximately 4.6 grams, or about 0.1479 troy ounces of pure silver. This composition was achieved by bonding an outer layer of 80% silver and 20% copper to an inner core containing 20.9% silver and 79.1% copper, resulting in the net 40% silver content for the coin as a whole. This is a significant reduction from the 90% silver composition used for the 1964 Kennedy half dollar.


