Lot 62240. Hamburg. Free City gold 20 Mark 1900-J MS64 NGC, Hamburg mint, KM618, J-212. A seldom-seen type that has only been offered by Heritage Auctions a handful of times. With only 30 graded on the NGC census, this Choice offering is bested by only two specimens. HID05401242017 © 2023 Heritage Auctions | All Rights Reserved.