1949 Apr. 11 Xikang Gold Yuan $1,800 airmail registered with return receipt by airmail cover ($100 + $500 + 3$300 + $400 + $500) to Chongqing, franked with Sc. 890 (3), 892, 894, because the registration slip and return receipt are still attached, the registration slip shows the very rare 'Double Air' chop which is usually torn off, creases (2 images)

1949 Apr. 11 Xikang Gold Yuan $1,800 airmail registered with return receipt by airmail cover ($100 + $500 + 3$300 + $400 + $500) to Chongqing, franked with Sc. 890 (3), 892, 894, because the registration slip and return receipt are still attached, the registration slip shows the very rare 'Double Air' chop which is usually torn off, creases (2 images)