Age and Condition: Older and well-preserved silver certificates are more valuable than newer or worn-out ones. Uncirculated notes in mint condition can fetch higher prices.
Serial Numbers and Signatures: Unique serial numbers, particularly those with repeating digits or low numbers, can increase the value of a silver certificate. Signatures of notable Treasury Secretaries or Federal Reserve officials can also add to its value.
Rarity: Limited print runs or specific series can make a silver certificate rare and thus more valuable.
Historical Significance: Silver certificates with significant historical events or figures depicted on them may have a higher demand and value among collectors.
In general, a US 1 dollar silver certificate with Lincoln and Grant in good condition can be worth anywhere from a few dollars to several hundred dollars. However, for particularly rare or exceptional notes, the value could reach even higher. It is recommended to have it evaluated by a professional numismatist to determine its exact value accurately.