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The first auction of the 51 teal blue looks okay. It is an aerometric filler, which is the "squeeze" filler. Seller is kind of sketchy (which is why I say this only looks "okay" ), and I don't recall ever seeing a 51 with an imprint on the barrel like that. Of course my experience is limited, it may be that Parker did make some 51's with Parker 51 inscribed on the barrel. Its a pity you can't see the inscription on the steel innards, that usually is a good indication of a 51's authenticity. Also you can tell if the 51 is a "special", which was a specific type of 51 that, while similar in design, is considered by many to not be as solid as a standard 51, and thus sells for less.
The second auction looks
beautiful!! First off you have a pen seller with 100% feedback, which is damn near impossible. Lots of great looking shots of this beautiful red 51. Man, I want it.
This is definitely a genuine aerometric filler 51. The M nib looks gorgeous. They say they have completely disassembled and cleaned the pen, which means it will be good to go straight out of the box.
The third auction doesn't have enough pictures for me to give a definitive up or down vote. The thing is, on the bay, there are lots of pen deals to be had from sketchy sellers who don't know what they have.
All of the above three are aerometric fillers. Aerometrics are, as you said, the later filling mechanism, and generally are the superior filling method (though fans of vacumatics might argue this point). Also it is super easy to clean. You can get the instructions and the full rundown on just about any filling system known to man on
Richard Binder's Site, but basically you fill the aerometric by holding it nib down in ink and squeezing the sac until bubbles stop appearing in the ink, waiting about 3 seconds inbetween pumps (usually takes about 4-6 pumps).
The vacumatic filling system was in earlier 51's as well as another Parker pen, the Vacumatic (gasp!
). Vacumatics
typically don't age as well as aerometrics, which means that usually a used vacumatic filler will need repair work unless it is specifically noted it has been restored. You fill the vacumatic by removing the pen's blind cap, where you'll find a little "pump". Hold the pen nib down in ink, and pump the little piston until bubbles stop showing in the ink (typically 10-12 pumps). Vacumatics are a bit more difficult to clean, because the suction power isn't as great as on the aeros, so it takes more pumps to suck in water and spit it back out.
So you've seen the aerometric filler, here is a pic of a vacumatic filler. This is a vac filler on a Parker Vacumatic, but it is the exact same filler system as a 51 vac. See the little piston under the blind cap? Thats how you know is a vacumatic filler:
And as another note, if you see a 51 described as a Demi model, this is just a slightly smaller 51, or as they used to call it in the less PC hey day of the 51, a "ladies pen". Exactly same quality as a full size 51, just a bit shorter.
Remember you can always look around the FPN marketplace or the green boards over at
www.pentrace.net. A lot of the sellers are in the states, but just about all of them are happy to ship internationally for an extra 8-10USD. I'm always more confident buying from someone on FPN or Pentrace, the same way I'm more confident buying from an established Head-Fi'er.
Again, my experience is very limited in 51s. This is just what I've gleaned over the past 6-7 months hanging around FPN and reading sites like Richard Binders or
www.parker51.com.
I love my Pelikans, they are currently my favorite pens (although I am loving the new Bexley I just got). The M800 is definitely a large pen, and is heavier then the M200-600, mainly because it has some metal fittings in it. For example, the threads on the piston are metal instead of plastic. I have never held an M1000, I can only imagine how huge that thing is. One day!