Guinea issued in 2018 a sheet with four stamps.
CLUB MED 2: viewtopic.php?f=2&t=16683
THOMAS W. LAWSON: viewtopic.php?f=2&t=13871&p=19724#p19724
AMERIGO VESPUCCI: viewtopic.php?f=2&t=7092&p=13527#p13527
KHERSONES: viewtopic.php?f=2&t=15101&p=17372#p17372
Guinea 2018 12.500FG sgMS?, scott?