The picture shows a view of this 1978 United States Navy Submarine Force 78th Anniversary Advertising Ceramic or Porcelain Coffee Cup. The mug is dated April 1978. The mug pictures an early U.S. Submarine and a modern day nuclear or atomic submarine. It is marked as follows:
78th ANNIVERSARY UNITED STATES SUBMARINE FORCE APRIL 1978
The mug measures 3-11/16'' tall. It appears to be in mint unused condition as pictured.