Metals (Section 10) Page 2 of 3
10-7 Yellow Metals Assorted - Includes all buttons made of yellow metal alloys
10-8 Brass - Alloy of copper and zinc (usually less than 40% zinc)
10-9 Copper
10-10 Gilt/Plated Assorted - Gilt refers to any metal plated with a thin coating of gold. Silver plate: a thin coating of silver.
10-11 Backgrounds - Metals only, including screen, twinkle, etc.
10-12 Decorative Finishes (DF) Assorted - Gilt/plated or tinned not included. Enamel acceptable as long as metal is the focus.
Note 1 - See Blue Book 10-0 definitions for discussion of 2 and 3-piece buttons with japanned tin or steel backs with a different face material.