AUSTRIA: 1 Thaler (1751) in silver (0,875) with Bust of Maria Theresa facing right. Crowned imperial double eagle with crowned Arms on breast on reverse. Mint: Hall. Inside slab by NGC "AU 55 / M. THERESA". Cert number: "5782520-012". Unique in pop in both companies. (KM 798) & (Dav- 1121).