Prussia. Wilhelm I gold 10 Mark 1888-A MS66 NGC, Berlin mint, KM504. A transitional year for this Prussian gold emission, the Wilhelm I issue being more scarce than the Friedrich III. This silky smooth honey-amber premium Gem is the lone MS66 awarded by NGC, besting its 8 Gem Mint closest competitors. HID09801242017 © 2024 Heritage Auctions | All Rights Reserved