In article ,
R.H. wrote:
Four of the six have been fully identified so far:

641. Two pieces of this set have been guessed correctly: a pen and pencil.
The last item is related to them, although in modern times this piece is no
longer used for the purpose for which it was made.

A knife, perhaps.

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There's no such thing as a free lunch, but certain accounting practices can
result in a fully-depreciated one.