The smaller Enlisted button is 156 S. It is 9/16″in size and has a regular shank. the 47 is in the Center of the button with a decorative edge. Price: 1 to 12 @ .55 each, 13 to 144 @ .48 each and over a gross .47 each. Matching button is 154 L and long shank 156 L Long.
102 S is the style number of the button, the S (small) is for the price group. This is a small 9/16″ button identical to the 101-L. It will go for cuffs, waistcoat buttons and such. This antique button has a winged phoenix with a wreath around the edge.