This type of currency represents a specific series of United States one-dollar notes issued in 1935, redeemable for silver dollars or silver bullion. The “f” denotes a particular series within the larger 1935 issuance, identified by a letter assigned sequentially. These certificates are distinguishable by their blue seal and serial numbers.
The importance of these notes lies in their historical context as a tangible connection to the silver standard era in the United States. Their potential benefit stems from their collectibility; certain series, conditions, and serial numbers can significantly increase their worth above face value. Scarcity and condition are key factors determining market appreciation.