Very Old Vintage Pencil

The largest pencil is 6 inches long.  It is a multiplication pencil.  The part with the numbers moves. I believe that the pencil with the clasp on it is a slate pencil.  In researching it that was the only thing that matched it at all.  It does write as can be seen in one of the photos I included.  The pencil in a holder is just that.  I believe the thin silver pencil was made in Japan.  And the last article holds lead and has an eraser at the top.

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