Open Edge plates - LE Smith
These Smith plates are easy to identify as they have a distinctive open edge scroll work.

Above is Abraham Lincoln, John F. Kennedy and the Morgan Dollar. To the right is Jefferson Davis and Robert E. Lee.

These Smith plates are also used to make the ICGA souvenirs for 1973, 1974 and 1975.
Smith also used the mold to make a Christmas commemorative plate for the year 1972.

See all of Smith's Christmas plates here.

For more information on collectible plates from the 1970s, see;

"The Plate Collector's Handbook".