Osmia made button fillers in the '30's. One either had to come up with a patent free piston, or pay Pelikan....MB&Soennecken I believe were still lever pens or Safety Pens before Pelikan dragged them screaming and kicking into modern times.
But it is a fine looking pen, and I of course know much less than you.
Try contacting Thomas/Kaweco.
Thank you for your input. I know that Osmia made button fillers but I don't have one in my collection. I do have a Kaweco Special, which is a button filler, see below:
I kind of think that Montblanc never went into lever fillers but used button fillers instead. For their quality models they favoured what was called "Stoßfüller", which is a button filler with a special mechanism so that the blind cap doesn't need to be removed. Instead, it is unlocked and then you just push down the blind cap to act on the pressure bar. Unfortunately, I don't have one in my collection and haven't even seen one in person. Seems to be a very elusive species.
Soennecken made both lever and button fillers as far as I know. So did Angloamer/National according to the little info I could find.
Hello OMAssimo, such a nice find!
I'm not convinced that the pen was made by National (earlier Anglo-Amer, later also Swiss Global). It's true that there was National Juwel, but also there was Kaha Jewel and the name was likely used by others. I've never stumbled upon button fillers by National, but I admit I'm not a specialist. However, there are three other details which separate this pen from regular National output: rather unfamiliar shape of the section, the type of feed not used by National and the lack of the specific leafy clip, somehow similar to that of Melbi.
The nib seems of German origin but I wouldn't exlude some Dutch producer, especially that there was one called Juweel.
The celluloid seems familiar but I can't remember now where I've seen it.
This is very intersting, indeed. And I share your scepticism whether or not my mystery pen was made by Angloamer/National. But the "JUWEL" imprint was at least a hint, also my assumed production time of the 1930s and that I thought that National (renamed in 1933 for obvious reasons as far as I recall) made button fillers during that time. But the latter might be incorrect.
So, the hypothesis next probable might be that the pen was made by a local jeweler, most likely Carl Klippel in Frankfurt. I couldn't find anything about this in the internet. But you mention something extremely interesting and I would like to learn more about this. What indicates to you that the nib is of German or Dutch origin? I only stumbled over the "14 car" but the "WARRANTED" and "1ST Quality" I'd consider typical for US or UK nibs of the period.
I've seen this celluloid material several times. For sure in German pens of the period but I think also in a number of UK pens. By the way, the blind cap, section, and cap screw/finial are all black hard rubber giving another hint that this pen was made in the 1930s. I smelled it on my fingers after using the pen for a day. This way I also found out that the pen still needs some work. It starves after about writing a page or two. I don't think it's the nib or feed. It could be a flow issue with the newly installed silicon sac. A #14 is rather thin in diameter and it could be that the ink doesn't flow freely within the sac. I'll have to see how to fix that.