Set of 2 Birds of Britain Basil Erde Calendars 1970s, Vintage Audubon-style Art

Used, but only markings are the corrective liquid (white-out) on the years of the 1978 calendar as shown. Birds of Britain as illustrated by Basil Erde 2 different years of lovely calendars with beautiful illustrations of a variety of birds. Set of 2 Birds of Britain Basil Erde Calendars 1970s, Vintage Audubon-style Art