NORTH KOREA (1994) Prevention of air pollution*. Proof sheet consisting of imperforate minisheet of 2. Signed and dated with official stamp on reverse. Scott No 3387, KSC No 3501. World Environment Day.
AVAILABLE AT $75
NORTH KOREA (1994) Prevention of water pollution*. Proof sheet consisting of imperforate minisheet of 2. Signed and dated with official stamp on reverse. Scott No 3388, KSC No 3502. World Environment Day.
AVAILABLE AT $75
NORTH KOREA (1994) Protection of animal resources*. Proof sheet consisting of imperforate minisheet of 2. Signed and dated with official stamp on reverse. Scott No 3389, KSC No 3503. World Environment Day.
AVAILABLE AT $75
AUSTRIA (2013) Youth hugging tree. Black print.
AVAILABLE AT $15
BELGIUM (1967) Birches. Trientalis. Ministerial proof. Scott No 683, Yvert No 1408. Nature preservation.
AVAILABLE AT $50
BELGIUM (1967) Dunes. Beach grass. Privet. Thistles. Ministerial proof. Scott No 684, Yvert No 1409. Nature preservation.
AVAILABLE AT $50
BELGIUM (1991) Hautes Fagnes nature preserve. Ministerial proof. Scott No 1406, Yvert No 2413. Tourist attractions.
AVAILABLE AT $50
TONGA (1990b) Broken glass* on beach*. Sun*. Shark fins*. Cromalin proof in full color on thick, glossy cardboard. Health and Safety issue inscribed "Swim From Safe Beaches" and "Beware of Broken Glass." Scott No 770b-c, Yvert No 812-3. Only a few exist! Rare!
AVAILABLE AT $100
PERU (2004) Various plants & animals*. Imperforate pair (also available as a unique signed, dated and marked "OK" block of 4 for $800.) Biological Diversity Day. Scott No 1392. Only 2 proof sheets exist, and only 1 was signed in the margin!
AVAILABLE AT $160
AUSTRIA (2016) Think Green. Black print.
AVAILABLE AT $15