spur-royal

from The Century Dictionary.

• noun An English gold coin issued by James I., and worth 15s. or 16s. 6d. (about $3.63 or $3.99). It was so named from the resemblance of the sun on its reverse to the rowel of a spur.

from the GNU version of the Collaborative International Dictionary of English.

• noun A gold coin, first made in the reign of Edward IV., having a star on the reverse resembling the rowel of a spur. In the reigns of Elizabeth and of James I., its value was fifteen shillings.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A former gold coin, first made in the reign of Edward IV, having a star on the reverse resembling the rowel of a spur.