1776-1976 Eisenhower Dollar type 2 with no mint mark, Type Two

Description

1776-1976 Eisenhower  Dollar type 2 with no mint mark, Type Two,  A Collector's Masterpiece
Wikipedia
says, "Eisenhower coins from 1975 and from 1976 bear a double date 1776–1976, and a special reverse by Dennis R. Williams in honor of the
bicentennial of American independence
.
Thickness
2.58 mm (0.1 in)
Edge
Reeded
Composition
Circulation strikes: outer layers of 75.0% copper 25.0% nickel clad with a core of 100% copper (in all 91.67% copper, 8.33% nickel). For
silver
clad: Outer layers of 80%
silver
with a center of 20.9%
silver
. Aggregate 60% copper, 40%
silver