Protest #1601-0-000270; nickel silver circular discs; 7403.23.00; 7419; EN 74.09; EN 74.19; Chapter 74, Note 1(g); Chapter 74, Subheading Note 1(c); Section XV, additional U.S. Note 2; GRI 2(a); Avins Industrial Products Co. v. United States; HQ 086844; Detroit Zoological Society v. U.S.; Tropicana Products, Inc. v. U.S.; 19 U.S.C. 1501, 1504(a)(b); 19 CFR 159.9 through 159.12