Very Pretty!!
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Call me slow but, looking at this picture it just occurred to me the reasoning behind their model numbers.
The price in yen then the addition of the lead size to that number.
It’s crazy to me that the 0.3 was most expensive but maybe to them it isn’t crazy at all!
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I wish they still made these for those prices
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I’m sorry I inadvertently announced that I had not watched that video.
It will be on my shortlist.
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The yellow Pentel INJECTO P154 0.4 looks great, while my the silver one feels too ordinary. damn. I’ve discovered more “rabbit holes” that should be filled in.
I guess the production cost for the automatic pencils with a 0.3 mm core was much higher than that of the already mass‑produced 0.5 mm version at that time, so it makes sense that the price for the 0.3 model is higher. (Because they’re more difficult to process, resulting in lower yield？)
My Pentel PG2003 stickers are the same as yours, but the Pentel PG1804 and Pentel PG1505 use barcode stickers on the back of the barrel. I think those are more modern production models.
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I’m biased to say this, but no pencil has ever come close to the feeling of the Accugraph, best pencil ever IMHO.
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You’re correct, the barcode sticker (white sticker) is an indication of newer models. More info here Pentel Accugraph difference between versions - #6 by cytherian
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How is the writing feel of the Injecto? Any similarity with a more common pencil? I’d guess they have a similar feeling to the Pentel 5 series, but might be wrong.
Yes, the model numbers for most of the P series (P, PC, PD, PG, PS) pencils are price in yen + a differentiator number + the size. The first part is a little variable, but follows the trend.
P325 started at ¥300 and is 0.5mm
P515 started at ¥500
P1035 started at ¥1000
PC125 started at ¥1500
PC215 started at ¥2000
PD335 started at ¥300
PD1055 started at ¥1000
PF509 started at ¥500
PG305 started at ¥300
PG1804 started at ¥1800
PN55 started at ¥500
PN105 started at ¥1000
PN305 started at ¥3000
PS705 started at ¥700
PS1045 started at ¥1000
PXE105 started at ¥10000
PXN205 started at ¥20000
Of course there are exceptions, such as the P205 since it was not sold in Japan (I don’t believe) until after the P320 series was discontinued.
And these were the original prices, as some of them are known to have increased, such as the PS1042 which went up to ¥1200 and the P515 which I have never seen for ¥500 (just on the shipping box) which I always see tagged at ¥700.
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I LOVE the Injecto!
I love the weight and feel of the pencil itself and I love the feel of the mechanism as it’s advancing lead.
It really is a pencil that should be added to anyone’s collection.
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The INJECTO was much lighter, and beyond its feel, its most distinctive feature was its refill mechanism — a lead‑cartridge system that allows for easy replacement. My speculation is that Pentel may have tried to emulate Sony’s approach of developing proprietary components for its product line to generate more profit, but ultimately abandoned the idea. Today, in my opinion, Apple is the company most adept at using special specifications to “empty” users’ wallets (I happened to be working at Apple when the first iPod was released).
I happen to have the original INJECTO manual from back then, plus an extra lead‑core accessory. The core box is designed as a replaceable cartridge: when you’ve used up the lead cores stored inside the barrel, the indicator frame shows an orange part (the orange piece falls out because it’s no longer supported by a core).
The cartridge‑style core box can be refilled with cores (like loading bullets). I’m not sure about its durability, because I’ve never actually used all the lead cores in a full cartridge. At the same time, friction from the lead cores causes the transparent interior of the cartridge to turn gray due to vibration and rubbing, which in turn lowers the visibility of the indicator window.
Back then, rumors about the INJECTO circulated among Taiwanese collectors. Pentel’s INJECTO sold poorly in Taiwan, resulting in a large inventory piling up in suppliers’ warehouses for years. Raising prices there wasn’t easy (although many sellers still tried). That story is almost a decade old now. Today, sellers are charging exorbitant prices for everything, making newcomers feel distanced from classic pencils. I strongly oppose price manipulation, but no one can truly change the market; we can only compromise. 
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Gold Injecto 
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I had a very brief experience with an Injecto (in 0.5): the pencil is unusually heavy when compared to items with similar dimensions, and I think the reason is the amount of metal in the construction — maybe the cartridge offers a tiny contribution as well — but it is also surprisingly responsive and pleasant to use. The grip system (a set of concentric grooves/rings running around the barrel) has some substance, but it never seems aggressive.
It is a pencil which manages to keep an appearance very similar to many of its semi-executive peers, but never truly mixes with the parent set. It seems a Pentel 5, but they are not the same. Quite interesting case. also, it comes in 0.4, and that is cool.
(The non-removable clip is a minus for me, but it’s not the worst example I can think of, and even adds some sort of accent to the body.)
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