the size of nibs
Giovanni, I was told this : feeds carrying numbers on them refer to diameter of the feed, so, for example, a feed showing 4 stamped on its lower part will accept a number 4 nib ( it refers to the nib curvature or dome ) and so far and so on . This is in regard to modern nibs, specially those supplied as nib units by manufacturers, say, Bock, Schmidt, JoWo, and so on . Must be the same in regard to old nibs .
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