1935-A Experimental "S" $1 Silver Certificate Fr. 1610 - Very Fine T-28 The irradiator works as follows:

The irradiator works as follows: A mixture of radioactive antimony and beryllium is enclosed in a lead container

1904-O Morgan Dollar in PCGS MS 61 PL

3437 oz ASW Description Obverse W

Calhoun to the left

Design Obverse: Bust left

1935-A Experimental "S" $1 Silver Certificate Fr. 1610 - Very Fine T-28 The irradiator works as follows:Signatures: Julian & Morgenthau (S) During the tenure of Julian and Morgenthau, a different type of paper was used for part of the 1 Dollar notes series of 1935 A. An "R" and an "S" were used as control letters and were surcharged in red on the obverse of the notes. The "R" stands for Regular Paper and the "S" stands for Special Paper.