The nimph with tongs? pincers? (f80r)

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My intermediate conclusion:
1) unidentified things which nymphs hold in their hands likely must relate to each other;
2) they may have direct or abstract meaning; so:
a) if we suppose that the object in the hands of the two nymphs in the top row of the You are not allowed to view links. Register or Login to view. is a spindle, the nymph in the central row, probably, keep scissors or shears (images are in the post #8 of this thread);
b) if we suppose that the nymph in the central row hold a pair of compasses or calipers, it is possible that the nymphs in the top row keep a plummet,

     


... hence the cross in nymph's hands on the You are not allowed to view links. Register or Login to view. may mean a You are not allowed to view links. Register or Login to view..

   


These pictures are of 16 century, but the staff itself is appeared in 14 c.
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Food for thought, as always.