Check for the 'S' mintmark on Eisenhower dollars. Coins minted in San Francisco are more valuable.
Look for the 1776-1976 dual-dated quarters. The ones without a mintmark are more common.
Examine the Kennedy half dollars for the dual date and the 'S' mintmark to determine their value.
Inspect the Bicentennial half dollars for the 'S' mintmark and the date to identify rare coins.
Verify the presence of the 'S' mintmark on the Bicentennial silver proof set to find valuable coins.
Consult with coin experts or use online resources to accurately identify and assess the value of your 1976 Bicentennial coins.