I recently acquired an Esterbrook M2 with a 9128 nib, and the seller graciously enclosed a second 9128 nib. They are slightly different in that one has 9128 embossed across the nib and the other has it embossed longitudinally along the nib. The latter also has the later feed with the hole that mimics a Sheaffer Touchdown. An eleven-year-old post on another site by someone called Inkophile reports that the former is finer than the latter, but that the latter is more flexible than the former. I'm wondering if anyone else has made a comparison between these two nibs?
Edited by corgicoupe, 08 August 2020 - 15:37.