"Signe "Ham" Hammarsten-Jansson (née Hammarsten, 1 June 1882 Hannäs, – 6 June 1970) was a Swedish-Finnish graphic artist who designed, among other things, around 220 Finnish ...
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postage stamps during the course of three decades. She was the mother of Tove Jansson, creator of the highly successful Moomin characters." - (Wikipedia (en) 10.04.2020)
