mill-sixpence

from The Century Dictionary.

• noun An English silver coin, of the value of sixpence, produced by the mill-and-screw process. See milled money, under milled.

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

• noun A milled sixpence; -- the sixpence being one of the first English coins milled (1561).

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

• noun obsolete A milled sixpence.