Fr. 1605. 1928E $1 Silver Certificate. PCGS Currency Choice New 63 PPQ. The F-B block notes began with serial number F72000001B, making this the 321st note printed. Bright and well margined with great color and bold embossing. While it might not seem like much to normal thinking people, fancy serial number collectors may be quite intrigued by mini descending ladder F72000321B.