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  2. List of most expensive philatelic items - Wikipedia

    en.wikipedia.org/wiki/List_of_most_expensive...

    This is a list of the highest known prices paid for philatelic items, including stamps and covers. The current record price for a single stamp is US$9,480,000 paid for the British Guiana 1c magenta. [1] [2] This list is ordered by consumer price index inflation-adjusted value (in bold) in millions of United States dollars in 2023.

  3. Permanent marker - Wikipedia

    en.wikipedia.org/wiki/Permanent_marker

    Permanent markers are used for writing on metals, plastics, ceramics, wood, stone, cardboard etc. However, the mark made by them is semi-permanent on some surfaces. Most permanent marker ink can be erased from some plastic surfaces (like polypropylene and teflon) with little rubbing pressure. They can be used on ordinary paper, but the ink ...

  4. Philatelic investment - Wikipedia

    en.wikipedia.org/wiki/Philatelic_investment

    The place of purchase or sale. Values vary according to where the transaction takes place. Prices vary from country to country for the same stamp and prices realised at an auction may be different from those charged by a dealer or in a private sale between collectors. Historical significance and/or the rarity of the postmark on a used stamp.

  5. Stamp prices are falling by 2 cents, and that's bad news for ...

    www.aol.com/article/2016/02/29/stamp-prices-are...

    Starting April 10, stamps for 1-ounce letters will drop in price from 49 cents to 47 cents after the expiration of a 2-year agreement. Starting April 10, stamps for 1-ounce letters will drop in ...

  6. Direct part marking - Wikipedia

    en.wikipedia.org/wiki/Direct_Part_Marking

    Highly polished metal surfaces should be textured to reduce glare prior to marking. The textured area should extend one symbol width beyond the borders of marking. Part Size When a 2D Symbol is used, the size of the part is not a relevant factor as the available marking area is reduced to below 1/4 inch square. Operating environment / age life

  7. Sun Yat-sen stamps - Wikipedia

    en.wikipedia.org/wiki/Sun_Yat-sen_stamps

    This issue, whose release began 1946-07-23. Stamps in this set can be recognized by the somewhat water-drop shape of the Arabic value tablets in the bottom corners of the stamps. These stamps were perforated 14, and issued without gum; nevertheless different papers and printing conditions give rise to several varieties.