9704.00Subheading
Stamps, postage or revenue; stamp-postmarks, first-day covers, postal stationery (stamped paper) and like, used or unused, other than those of heading 4907
Section XXI — Works of art, collectors' pieces and antiques
This is a 6-digit subheading — the most specific level of the international HS. Country tariff schedules extend it further; the US tariff lines (HTS) below refine it to 8–10 digits for duty purposes.
US tariff lines for this subheading are not in the bundled starter dataset yet — the full HTS schedule is coming soon. You can still search by code in the tariff simulator.