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  1. I'm gradually developing a strong distaste toward any pen with a rubber sac. I've just had too many problems with them. I'm beginning to understand why a "sac-less" design was such a big selling point back in the 1930s and 1940s. I've seen "new old stock" pens that came with rubber sacs 40+ years old and worked Just Fine. I've also, unfortunately, seen brand new rubber sacs that failed after a relatively short period of light usage. I've got a suspicion that some inks (i.e. some more than others) cause rubber to age and deteriorate. I've got a suspicion that some sacs available today
  2. Does the CS lever filler employ a sac? Recently bought a few vintage flex pens which employ an internal sac and found that they have an atrociously small ink capacity. Given that I am looking to add my first conway to my collection; I am fearful..
  3. WirsPlm

    First Esterbrooks. Id?

    Hello all! My first 2 Esterbrooks arrived, and I'm super excited! One is grey and one is blue. The blue pen is 4.5 inches long. The gray didn't have a cap, so that's a reason to cruise antique stores and garage sales for a while. I got them both open and the nibs soaking. One of the sacs came out, but the other is stuck in the barrel. I understand delicate exploration with tweezers is called for here? The one where the sac came out also dumped a broken J bar. Can anyone help with IDing the pens I got? The original eBay listing is here, and I'll get some milimeter measurements a
  4. I have recently acquired a Conway Stewart 75 which recquires a new sac as the old one has solidified and broken into hundereds of tiny chips. So far I have been unable to locate any information on the appropriate size and I was hoping that someone here could help me out. (Also, any tips on sac replacement are welcome). Thanks.
  5. I like to mix ink, and I want many cheap pens that I can use for my concoctions. I was thinking about buying a 10 pack of the Hero 616 pens. But do you have to fill it from a bottle? What I generally do with the regular "piston type" converter pens is mix the ink up in a water bottle cap and suck it directly into the converter. I'm not sure if this is possible with the Hero 616. I generally only make .5 millilitres at a time. So yeah, I know this is a newbie question, but is it possible to suck that small quantity of ink into the sac? Thanks.

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