$1 1957 Silver Certificate MISMATCH PREFIX ERROR A/ Q RARE! PMG VF 30

Generally speaking, mismatch prefix / suffix letters are MUCH SCARCER than mismatch serial numbers. Adding to the excitement, it occurs on a silver certificate with an enormous discrepancy in the prefix wheel as the lower left serial as the first letter in the alphabet (A) and the upper right spun to the seventeenth letter (Q) to begin the serial numbers. This is classified as an R-6 mistake in the Aug. 2025 released 5th ed. of United States Paper Money Errors by Dr. Frederick J. Bart and Bianca B. Bart.