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 . Biological Diversity Day. Scott No 1392. Only 2 proof sheets exist!
AVAILABLE AT $160
AUSTRIA (1974) Mailed hand* holding rose*. Black print. Scott No 1006, Yvert No 1297. Environmental protection.
AVAILABLE AT $20
AUSTRIA (2021) Polar bear*. Chamois*. Alps*. Black print of S/S for climate change.].
AVAILABLE AT $15