1987 $20 x 5 (KNB79d), consecutive serial nos.: AL001021-1025. The KEY date of this series and with nice 1st Prefix, nice small numbers. Graded PMG 65E, 66E, 65E, 67E & 66E respectively.
1997 $20 x 11 (KNB87L), all same Prefix and fancy serial nos.: CZ000001, 111111, 222222, 333333, 444444, 555555, 666666, 777777, 888888, 999999, 1000000. All UNC. A rare set.
The Hongkong and Shanghai Banking Corporation Limited:
2003 $20 x 2 (KNB93b), both with with interesting Ascending & Descending Ladder serial nos.: BW123456 and BW654321. Graded PMG68 EPQ and 64 respectively.