I would say they are what they refer to as the "Black beauties". I am sure they look more pronounced in hand than you could photograph. Those are the most common years to find them.
1959 and 1959 seem to be the most common but I have found them in 1954 1955 and 1960 at times.
1959 and 1959 seem to be the most common but I have found them in 1954 1955 and 1960 at times.





















