Bust of Philip IV, right, with a large milled collar, a folded cloak and a lion's head on his shoulder, wearing the collar of the Order of the Golden Fleece., Coat of arms of Philip IV supported by two lions on their back legs, and holding a crown above., Unfortunately, this specimen has suffered from considerable circulation and has been worn over time, with numerous scratches on both sides.Named as a double ducaton, it seems that this coin was not an official circulating issue but was rather an pattern strike, considered as a "piéfort" twice the weight of the ducaton. The Vanhoudt does not reference it, but only mentions the single ducaton, making this coin struck for an exceptional strike that was not destined to be put into circulation. There are also coins weighing around 90g, 3 times heavier than the circulating ducaton. Extremely rare specimen, almost never seen in auctions for this year. Davenport 4443., PHIL• IIII• D• G• HISP• ET• INDIAR• REX• 16(Hand)23•, •ARCHID• AVST• DV-X• BVRG• BRAB• Zc•