100 Corona 1909, Vienna. Obv. FRANC IOS I D G IMP AVSTR REX BOH GAL ILL ETC ET AP REX HVNG. Bare head right. Rev. C CORONÆ MDCCCCIX / 100 - COR / 1909. Crowned double-headed eagle, coat of arms on his chest. KM 2819; Fr. 507. AU. 33.88 g. NGC PF 64 CAMEO
The only coin graded PROOF 64 at both PCGS and NGC. Only one coin is graded higher, PROOF 66 at NGC.