1. Does #3, #5, #10 adjustable nib only equipped on the first generation dorics?
2. Are there any adjustable nib that with the solid silver slider has the same size as #6 and #9?
3. Every adjustable nib should be together with ink shut off device when they are at factory condition, right?
4. Why the semitransparent segments on doric's barrel have different length in second generation standard dorics? (see pictures)
5. Except adjustable nibs, which nibs are considered to be the original nibs of Doric?
6. Does the second generation standard Doric's barrel have the same length as the Oversized one?
7. Which generation dorics are more collectable?

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