The pictureshows this 1940 New Zealand Centennial Souvenir Handkerchief. It pictures a building and landscaping in blue. I do not know anything about the celebration that took place, but I am guessing that it was like the United States Bicentennial or maybe like that of one of the World's Fairs or Expos. In any case it is now (63) years old. It is marked as follows:
SOUVENIR N.Z. CENTENNIAL 1840 - 1940
It measures about 8" x 8". It has be folded and packed away all these years ans is in excellent condition.