Ha! Maybe next time I’ll aim for an MP-fied episode of Jeeves & Wooster.
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Both pencils do have something at the other end, but it isn’t decorative. Purely functional.
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A letter opener?
Maybe a hidden rubber stamp and/or seal?
Not stamps or letters. Numbers, maybe.
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Perpetual Calendar?
Seal?
There are no numbers on the pencil itself - it has a more operational role.
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Is it a combination “pencil & key”?
Or something like a slide rule/mechanical calculator? It would be very limited in its computing power given the tiny lengths involved, but I see some possibilities.
Your last suggestion is very, very close! Maybe you’ll now be able to guess the name imprinted on the barrel of both pencils…
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Well, if it is a slide rule, I’d say Albert Nestler — but I thought it was not a German breed.
Slide rules were also made by Aristo (Austria, perhaps?), Faber-Castell, Marabu, Koh-I-Noor (Czech Republic), but also Tecnostyl (Italy) and many others. Perhaps too many to guess correctly.
If it’s a mechanical calculator, the famous name on the tip of my tongue is Curta (which means Lichtenstein as a place), but maybe it is just too small a space for an even tinier version of a Curta.
Finally, I think I have a circular slide rule, probably made by Logarex (or that is the name of the model? Can’t remember right now), and once again that is Saxon by origin.
PS: aaand here it comes another rabbit hole to dive into…
My pencils are nowhere near as clever as all those slide rule pencils, but they do both have a clever friend who can do a couple of things that most slide rules can’t.
Guessing only: a rolling odometer?
Calipers?
These are great ideas - both of which I have seen implemented on mechanical pencils - but still much too clever for my pair.
It’s probably time to show you what’s on the other end and take it from there:
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Are these for embossing?
No, they’re not used on paper or any kind of surface.
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Is this used to
Either test voltage?
Or
Punch holes?
No electronics or moving parts involved, but they are used in holes (of sorts).
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SIM extractors, only they arrived half a century too early and flopped, the market wasn’t ready 
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