This year’s winter stamps from Sweden feature pictures of snowflakes by reknowned Caltech physicist Professor Ken Libbrecht.
The snow crystals were photographed by the professor who also gave them their poetic names: No. 402 Three Crystals, No. 403 Stella Denrite, No. 404 Double Plate, No. 405 Stella Plate and No. 406 12 Pages. The stamps are designed by Gustav Mårtensson and engraved by Lars Sjööblom and Pjotr Naszarkowski.