Pirkko Vahtero
Pirkko Vahtero was a Finnish graphic designer and heraldist. Over the course of time, Vahtero designed a number of Finnish postage stamps and securities. She designed around 140 Finnish stamps and also designed stamps for other countries such as Costa Rica, Denmark, El Salvador, Iceland, Kuwait, Lebanon, Norway, Sweden and Venezuela. Vahtero was born on 16 December 1936, and died on 22 February 2025, at the age of 88.