Solid number
0 in stockEvery digit in the serial number is the same (for example 888888 or 111111). Collectors prize these for their visual symmetry.
Rare serial numbers
Browse by issuer, era, denomination, monarch, signature or Pick number — plus a rare serial-number glossary. Each page links directly to matching in-store inventory.
Collector indexes
Rare serial numbers
Radar / palindrome
0 in stockThe numeric part reads the same forwards and backwards (for example 123321). These “radar” notes are popular display pieces.
Triple 8 / lucky 8
9 in stockContains three or more consecutive 8s. In Hong Kong and Chinese collecting, 8 is considered an especially auspicious digit.
Low serial number
0 in stockA very low numeric serial, typically in the first few hundred notes printed. Low numbers are often kept as premium specimens.
Binary serial
0 in stockUses only the digits 0 and 1 (for example 101010 or 110011).
Ascending ladder
0 in stockDigits rise in consecutive order (for example 123456 or 234567).
Descending ladder
0 in stockDigits fall in consecutive order (for example 654321 or 987654).
Repeater pair
0 in stockAlternating or doubled digit pairs (for example 121212 or 898989).
Round number
2 in stockEnds with multiple zeros (for example 100000 or 500000), marking a round numeric milestone.
Two-number serial
4 in stockThe numeric serial uses only two different digits (for example 97999997 or 121212). Collectors call these “two-number” notes.
Three-number serial
14 in stockThe numeric serial uses only three different digits (for example 33399888 or 123231322). Collectors call these “three-number” notes.
Matching pair (same serial)
3 in stockA pair of banknotes sold together with the same serial number—often from two issuers (for example Macau BOC and BNU sets).
Matching serial set
1 in stockA multi-note set where every note shares the same serial number—for example the Standard Chartered Hong Kong 1 July 1997 mythical-creatures reunification set (serial A979050, five denominations).