More from this 1970s series distributed by the Hor Tai Bookshop. Two of these cards are available, showing the old border gate separating Macao from the China mainland. This crossing has become a bit more sophisticated now, and a lot bigger. One card is unused and in great shape (Grade: 1, $22) while the other was mailed in 1982, with three stamps and illegible postmarks, and a blue airmail sticker affixed (Grade: 1, $34)