173 S is the smallest in the series of domed buttons with a rim. It’s size is 9/16″. Made in Britannia pewter which is lead-free, the same as all our pewter products.
Matching domed buttons are 106 and 107.
108 M is in a series of 3 buttons that are domed with a rim. The rim increases with the size. The first is the smallest 108 S, it is 5.8″ and a favorite with seamstresses for this period.
Matching buttons are 109 F and 110 L.