United States. 1 Dollar 1999 American Eagle 'Vierjahreszeiten'- Sommer, 1 Oz (.999) Silver - Ungraded Era: pre 2000 Country/province: United States Year/period and variation: 1999 American Eagle 'Vierjahreszeiten'- Sommer, 1 Oz (.999) Denomination: 1 Dollar Precious metal: Silver Condition: Ungraded Coin type: Modern world coins (non Euro coins post-1960) United States 1 Dollar Year of publication: 1999 Motif: "Silver Eagle Liberty" Weight: 31.10 grams. Fineness: 999 Metal: Silver Mint quality: prooflike Diameter: 40.60 mm Ø Circulation: 5,000