It looks like the middle pencil is a Version 1, Gen 1 (at least according to what I have). The Lead Hardness Ring has the 2H to HB covering only half the ring, and I do not see anything on the band of the clip, implying that it has the uppercase PENTEL going down the clip.
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Thanks a lot for the detailed explanation.
Since most products using the Version 1 mechanism disappeared around 1971–72, I think the remaining stock was probably used up in the PMG.
@DarkwingDuck I was just looking a little closer at the picture of the breakdown of the 3 PMGs.
Another indicator that the middle PMG is a Version1, Gen 1 is the cleanout pin on the plunger is straight.
Also, are the threads on the white connector on the left narrower than the one on the right? It looks like it may be a Version 2, Gen 1, which would give us 1 date for that Generation, since mine does not have a date.
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The lead hardness ring on my Pentel PMG is metallic, different from the plastic collars shown in all the other pictures. Does anyone know why?
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The gold ring was export, and the red ring was domestic.
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Hello.
Do you know if products with a production date of December 1975 already had JIS?
I have confirmed that a pencil with a production date of January 1976 does have JIS.
So I’m wondering if the start of the production date code and the introduction of JIS happened at the same time.
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The earliest date stamp I find on pencils with the JIS sticker is 751200.
I have 4 pencils with this date stamp. A P1035A Kerry and 3 of the Corn & Wheat PS705 pencils.
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Actually looking at my spreadsheet, the Kerry that has the date stamp of 751200 still has the pre-JIS triangular sticker.
Does 751200 mean 7512xx (December 1975 in general)?
If so, does that suggest that JIS started appearing from January 1976?
That is my interpretation.
My first JIS stickers were on the above pencils with the 751200 stamp.
Ok, thank you for your reply 