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Guinea-Bissau issued in 2019 two miniature sheets with icebreakers.

SAMPO: viewtopic.php?f=2&t=16815
POLARSTERN: viewtopic.php?f=2&t=10968&p=11635#p11635
MUDYUG: viewtopic.php?f=2&t=16816
HENRY LARSEN: viewtopic.php?f=2&t=16818

YAMAL: viewtopic.php?f=2&t=9787&p=10114#p10114
AKADEMIK FYODOROV: viewtopic.php?f=2&t=7314&p=10770#p10770
NATHANIEL B PALMER: viewtopic.php?f=2&t=10950&p=11614#p11614

Guinea Bissau 2019 MS 640FCFA and 3300FCFA, sgMS?, scott?