3 old porcelain cultural revolution small plates , depicting Mao Tze Tung

a set of 3 porcelain old cultural revolution small plates , depicting Mao Tze Tung.
Such plates were used as memorabilia by numerous households in china during the cultural revolution.
Plate 1 depicts Mao, as a leader during the long march,
plate 2 depicts Mao as the leader during the ww2 and civil war,
plate 3 depicts Mao during the cultural revolution.
Signed, date 1968.
Size each 20 cm.