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Russia

postage

1991, May 14 Nobel Prize winners (1991) unwmk p. 12.25x12

-	15k	multi	A. D. Sakharov
-	15k	multi	I. I. Mechnikov
-	15k	multi	I. P. Pavlov

Brazil

1991, May 14 p. 10.75x11.75

-

500.00cr

multi

Caesalpinia peltophoroides

Ireland

1991, May 14 Europa 1991 issue (no perf info)

-	32p	multi
-	44p	multi

1991, May 14 Battle of William 300th issue

-	28p	multi
X	28p	bl & brn

Switzerland

1991, May 14 Europa 1991 issue - space technology p. 11.5

X	50	multi	Ariane fairing
X	90	multi	Giotto probe

semipostal

1991, May 14 Pro Patria 1991 issue (no perf info)

-	50+20	multi	by Wolf Barth
-	70+30	multi	by Helmut Federle
-	80+40	multi	by Matthias Bosshart
-	90+40c	multi	by Werner Otto Leuenberger

1 to 14 of 14