John Lennon's Montblanc special edition pens
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It's a Montblanc so it's very expensive from 500 Euros to 20 000 Euros ( Yes 20 000 Euros) for the edition limited to 70 copies with Diamond, Saphir & "or blanc".
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There are several limited edition John Lennon's pens (70 copies to 1940 copies) or boxsets with 3 pens.