Which 51's did you decide to keep in your collection?

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From what I've read at least the 51 is considered a must for any collection. I've had probably a dozen pass through my hands that I've restored or tidied up. But I've kept only the 1st one I bought a Mark II red with parker 51 lustraloy cap. A fairly uninspiring pen.

Up to that point I'd only bought modern pens. Making the fact I'd got it at quite a low price I think £33. For a pen that was in mint condition quite surprising. I've come across more interesting pens however I'm bit too attached to this one to warrant switching it.

With the 51 being available in it's thousands which ones have you kept?

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