Seville, Spain, gold cob 1 escudo, Philip IV, assayer D, mounted shield-side out in 18K white gold ring with .20 carat of channel-set diamonds, size 11, signed by jeweler R. Korwin. 20.17 grams total. Choice AU with bold, complete shield and some legend detail including king's ordinal IIII, full cross visible as well, nicely mounted in the ring with vertical diamond embellishments down each side.
Estimate: 2000 - 3000 USD