ACCUMULATION, 20TH CENTURY, STRENGTH IN MINT EUROPE, HIGHLIGHTS INCL. SOUVENIR SHEETS: KOREA NO. 286, MEXICO NOS. 896A & C234A (FOUR EACH), SPAIN NOS. 877A & 878A (FIVE EACH), VATICAN CITY NO. 242A (FIVE), MANY BLOCKS OF FOUR INCL. LUXEMBOURG NOS. C16-C20, PORTUGAL NOS. 784-791, WITH A GENERAL GOVERNMENT AND A FEW THEMATIC COLLECTIONS, ETC., VAST MAJORITY NEVER HINGED, FINE-VERY FINE