The Hongkong and Shanghai Banking Corporation, $50, 1.1.1987, replacement serial number ZZ070310, (Pick 193a*), PMG 67EPQ Superb Gem Uncirculated. Extremely rare. KN Boon only lists this as 'Rare'. A superb gem note that is a must have note for the collector of replacement notes!.
Estimate: HK$5,000 - HK$8,000