Plastic and metal
Overall: 3/4 in. (1.9 cm)
Small round button with 16/1 pictured in indigo font on white and gold toned background, text on bottom "PATD JULY 21 1896", back of button printed, "The Whitehead & Hoag Co., Newark, N.J., patented July 17, 1894, April 14, 1896."
Due to ongoing research, information about this object is subject to change.