QUOTE(trailrnr @ Feb 14 2008, 12:09 AM)
I was hoping that somebody familiar with the Stipula Etruria 991 could describe (or better yet, post a picture of) the pen's convertible piston filler unit.
Sorry, very low bandwidth rate here, currently, and no picture available either right now.
Is it a one-piece unit?
Yes. And it is operated by the piston knob of the pen.
Is it made of plastic, metal, or both?
Metal (bronze), plastic (window, and mechanism), rubber (plunger and seals).
Is there any writing on it?
Bronze for the lower and middle parts, transparant plastic between the bronze parts, black plastic for the turning mechanism and rubber seals.
Are there any threads on it?
No. The outer part of the piston turning mechanism is partly ribbed, which is engaged by the piston knob on the pen. It does require a little care to insert it into the barrel so that the ribs engage with the inside of the piston knob. It should stick out only about 3 mm prior to screwing the barrel back into the section.
There are some grooves on the lower end of the thing, which goes into the section, because you wouldn't be able to take it out, otherwise. It increases grip on those 3 mms stickign out.
Does it have a larger capacity than a standard convertor?
Yes, as it is essentially the same size as any other internal piston filler unit.
... any description will help me out a lot, thanks!
Well, I do hope this helps
Essentially, with the 3 different big piston converter Etrurias (and one of the Novecentos), you have a PF, whcih doubles as a c/c - pretty clever construction IOW. Best of both worlds, IMO. Do note that the 991's converter is different to the other ones, and not exchangeable. It is only usable in the 991.
HTH, warm regards, Wim