… Postage or revenue stamps, stamp-postmarks, first-day covers, postal stationery (stamped paper), and the like, …
Explanatory notes
… ‑ Postage or revenue stamps, stamp‑postmarks, first‑day covers, postal stationery (stamped paper), and the like, … i.e., the stamps of the kind normally used for affixing to correspondence or postal packages; “postage due” stamps, … stamps, registration stamps, circulation permit stamps, consular stamps, stamped revenue bands, etc. (C) …