Watch List notes:

(x) Kingdom of Denmark and Norway, Frederick III (1648-1670), "Köhler's Doppeldukat on the Repatriation of Gold from Overseas Territories". The "Guinea" or "Ship" 2-Ducat, 1658, Copenhagen, by Heinrich Köhler, FRIDERICUS : III : D : G : DANIÆ : NORWEGIÆ *, crowned, draped and mantled bust right, rev. VANDALOR : GOTHOR : Q : REX, three-masted ship sailing left in sea, ian and dem across fields, date in exergue, 6.95g, 4h (Aagaard 20.3; Hede 28A; S.3; Fb. 112), faint traces of crimping and doubling, otherwise lustrous and toned, a pleasingly bold very fine, extremely rare, only 100 reportedly struck from repatriated African gold from Guinea

Provenance
The George Webber Collection of World Gold Coins