Szechuan, Airmail, 1949, $10,000 on $27 (Chan SA7e. Scott C2b), right margin block of 4, overprint on $27 without CNC surcharge, fresh, without gum as issued, Very Fine, scarce, signed L. Y. Woo. Estimate HK$ 2,400 - 2,800. Est. HK$2,400-2,800 (Image1)