What is the '1c Magenta', which (at $20m) became the most expensive man-made object ever in terms of weight to value?
Adhesive postage stamp Postage stamps Post stamp Postage stamp Postage Stamp Stamp (postage) Postal stamp Postage stamp/how dispensed
postage stamp how dispensed adhesive postage stamp postage stamps stamp postage post stamp postage stamp postal stamp
postage stamp
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Postage stamp