1 Rub. Control Mark Study

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    • 22 November 2020 at 11:02 pm #30923
      A Safonoff
      Participant

      Several catalogues list Control Marks in the sheet margins for the 1910 1 Rub. Issue –

      1.  Control letters of  “crisscrossing Vs”

      2. 1 to 3 Control  Lines of various colours printed printed in the vertical margins

       

      Is anyone aware of the existence any in depth Studies or Documentations of these Control Marks?

    • 8 January 2021 at 5:56 pm #31102
      Ged Seiflow
      Participant

      You might want to look at Fomin’s Katalog-Handbuch (1997) page 46 onwards. This might be sufficient for your needs.

       

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