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  2. Artist's proof - Wikipedia

    en.wikipedia.org/wiki/Artist's_proof

    A proof of an etching by Hubert von Herkomer, without text, which would appear in the empty rectangular portion of the page above the artist's signature.. The term "proof" is generally, but not consistently, applied only to prints from the late eighteenth-century onwards, beginning with the English mezzotinters, who began the practice of issuing small editions of proofs for collectors, often ...

  3. Die proof (philately) - Wikipedia

    en.wikipedia.org/wiki/Die_proof_(philately)

    Die proof for the United States Jefferson issue of 1861 Approved proofs from Waterlow and Sons printers for a Bolivian stamp issue of 1943. (Subsequently punched for security purposes.) In philately a Die Proof is a printed image pulled directly from the master die for an engraved stamp.

  4. List of military headstamps - Wikipedia

    en.wikipedia.org/wiki/List_of_military_headstamps

    The symbols on the lower arc of the stamp indicates the caliber (7.7mm, 5.56mm or 7.62mm) and R# or R#M# indicate the model (R) and mark (M) of the cartridge, like the Commonwealth L#A# stamp (e.g., R1M1 is the first model and second Mark of a cartridge). Later, the 2-digit year is in the 12 o'clock position and a digit in the 6 o'clock ...

  5. Imprimatur - Wikipedia

    en.wikipedia.org/wiki/Imprimatur

    As a metaphor, the word "imprimatur" is used loosely of any form of approval or endorsement, especially by an official body or a person of importance, [2] as in the newspaper headline, "Protection of sources now has courts' imprimatur", [16] but also much more vaguely, and probably incorrectly, as in "Children, the final imprimatur to family ...

  6. Imprimatur (philately) - Wikipedia

    en.wikipedia.org/wiki/Imprimatur_(philately)

    In philately the word imprimatur refers to the first stamps printed from an approved and finished printing plate. [1] The term is particularly associated with British Victorian stamps as it was the practice of the printers to retain the first sheet as a record. [1] The word is from the Latin "let it be printed". [2]

  7. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    A stamp on the drawing saying "ISSUED" documents that RTP has occurred. RTV: room-temperature vulcanizing; return to vendor: 1. RTV sealants, a way to seal joints. 2. Return to vendor, send parts back to a vendor for rework or refund because they are nonconforming. Such RTV often requires an RMA. RZ, Rz: roughness, mean depth: See surface ...

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  9. Stand by Your Ad provision - Wikipedia

    en.wikipedia.org/wiki/Stand_by_Your_Ad_provision

    The "Stand By Your Ad" provision (SBYA) of the Bipartisan Campaign Reform Act (BCRA, also known as the McCain–Feingold Act), enacted in 2002, requires candidates in the United States for federal political office, as well as interest groups and political parties supporting or opposing a candidate, to include in political advertisements on television and radio "a statement by the candidate ...