Once again, the help of the community is needed…
I recently bought a few pencils (no, not really, it was more of a flood of pencils, but let us not digress here), and three of them were particularly hard to identify. Impossible, actually. Hence, a cry for help here.
The first MP is an unassuming, basic drafter by Tombow, in a nice pale blue colour — here in Italy we would call it “azzurro” (azure? turquoise? Any teaching on your colour perception will be welcome) — whose pocket clip looked quite old. I know nothing about this pencil, save it looks generally well deisgned, but also on the cheap end. Pictures incoming…
After a wide shot, here are two details (pocket clip and grip/tip section):
The second pencil I got is… well, it is a strange case, so let me tell you the whole story.
I was chasing high-end Koh-I-Noor MP’s (they are not that common), and thanks to a couple of old leaflets I managed to find the so-called “500” and “700” series; I still can’t tell the precise product code, as my source was a catalogue of an Italian retailer which had intermixed the original codes with its own internal numbering system; all I knew was that, at a certain point in time, probably the Eighties, Koh-I-Noor had a double-knock MP listed as its top of the range. This is an excerpt from that catalogue, and I was interested in the lower model (the top one is allegedly a half-slide, versus the double-knock):
Enters an Italian seller on Ebay, from whom I acquire what he advertised as the “KIN 5310”; not a cheap purchase, but a nice pencil with “Koh-I-Noor” clearly imprinted on the middle ring, which however I discovered to have a missing end metal ring (the rear cap was already described as missing). Still, I was an inch closer to the end of the story.
A few months later, I found an ad on another platform for what looked exactly like the KIN 5310 (mind, not the actual model number), at a decidedly super-cheap figure, so I promptly bought it. When it got here, I quickly checked the inscription on the middle ring, ready to spot “Koh-I-Noor”, and I found… “TOMBOW”!!!
I think at this point it is easier for me to show you what I mean, so, here are some pictures:
The specimen on top is the complete one (made by Tombow), whereas the one on the bottom is the one marked “KIN” (and notice the missing end ring, and the rearbutton cap provided by a donor pencil). When the tip is advanced, they look as follows, and they are clearly the same:
Finally, the middle ring and its different inscriptions:
You can imagine my questions for you now:
• What are the names/models of the two Tombow pencils (plain blue drafter and black double knock)?
• What is the true name of the KIN derivation sold as high-end mecha?
• What was going on at the time between KIN and Tombow? Was the former rebranding and reselling the other, or did they both buy at the same third-party maker in Japan?
As always, thank you for taking the time to read my scattered thoughts, and possibly answer my silly questions. 
