102 is the style number of the button, the S (small) is for the price group. This antique button has a winged phoenix with a wreath around the edge. It is a small 9/16″ button identical to the 101-L. It will go for cuffs, waistcoat buttons and such. 1-12 @ .55 each, 13 – 144 @ .48 each and over a gross .40 each.