I recently acquired Bexley's latest Mandarin Yellow pen from my friend Dennis Bowden at Parkville Pen.
It's a larger version of the regulkar version Poseidon and for a guy with big hands like me, it's a very comfortable writer. Available with either silver or gold trim, mine has the gold and is fitted with a lovely Bexley Stub nib.
I cant speak for Jack, but I had a clients bexley stub on the bench for some basic flow adjustment. I was allowed to use it for a few weeks & I loved it. Crisp lines yet smooth writing all the way through. I personally couldnt spot a down side on the nib.
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Tu ne cede malis sed contra audentior ito ~Yield not to misfortunes, but advance all the more boldly against them