1960's Japanese Tea Set

When my Dad was in the Air Force in Misawa, Japan in the late 1960's he bought 2 identicle Japanese tea sets and gave one to each of my grandmothers.  My maternal grandmother left her teases to me since I was born in Japan.  It has been sitting in a box in my basement for the past 20 years and I am wondering what it is worth.  There are five cups, sauces and plates, an tea pot and a creamer jar and sugar dish.  The porcelain is swirled with an eggshell color, along with purple , pink and bluish green hues.  There is gold on the rims of all of the pieces.  There is not a stamp of any kind on the bottoms.