Greece
George I Essai 10 Lepta 1912-(a) XF45 PCGS, cf. KM63, Karamitsos-139a. Variety without privy marks. Notably rare, while the present type is not designated as an essai by the SCWC, both Karamitsos and Divo indicate that these "no privy marks" issues were struck as unindicated essais that frequently entered into circulation.
From the Engelen Collection of World Coinage
HID02901242017
Estimate: 400-600 USD