CONDITION SUPERB UNLESS STATED; PRICED ACCORDINGLY
4 FIRST DAY COVER CARDS 1987 PHQ100 SIR ISAAC NEWTON;SCIENTIST;OPTICS;
THE MATHEMATICAL PRINCIPLES OF NATURAL PHILOSOPHY; MOTION OF BODIES IN ELLIPSES; OPTICS; THE SYSTM OF THE WORLD
SET OF 4 CARDS, EACH MATCHING THE STAMP ON REVERSE OF CARD,
STAMPS: 18+22+31+34P
FRANKED "FIRST DAY OF ISSUE ST ALBANS"