Ishihara Colour Vision 24 or 38?

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    • May 3, 2023 at 1:56 pm #378
      marooms
      Participant

      Dear ALl,

      Who is using 24 plates and who is using 38 plates. Could I have a show of hands?

      Reason: Network Rail PTS standard states 38 plate should be used.

      Thanks,

      Mark

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