An interesting edition of Platinum Double Action Pen/Pencil. I guess this player must be very famous in Japan.
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I think that’s Japanese home run legend Sadaharu Oh 
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I’m glad I don’t know who that player is else it would stir an old obsession of mine.
Had that been Will Clark I would have offered Pearson’s retirement savings for it. Easily.
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I recently received this, and fortunately it also includes a brochure. In the picture below, the first three pages come from the brochure (the rest page is not related to the pen), and the rest pics come from the three instructions in the pen packaging box.
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This is the special version of the first generation Platinum Double Action, as a promotional gift for ordering 小4時代 magazines for one year, both were released in 1978. If you want to buy one, use the following search term: 王貞治選手のワンツーペン 旺文社 小4時代 年間予約特典 王選手のサイン入り (instead of プラチナ ダブル アクション, otherwise you will only find the regular edition)
By the way, as far as I know, there are 4 versions of Double Action,
A. Ordinary 1+1 model (both buttons are black)
B. Rare double pencil style (0.9 red+0.5 black, 2 color button)
C. Compared to a, a slightly rare special 1+1 version (2 color button, a special shape for clip, and the text printed on the back of the pen is a signature instead of ‘DOUBLE ACTION’)
D. An inexplicable white button version, you can ignore it
The market price of A and C is pretty low, about 1,000 yen, while B is quite expensive, maybe a couple of thousand yen. I think the most interesting and collectible version is C version. The following are supplementary Internet images, including the instruction of regular version.
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@Linus2K You’re a treasure trove of information! Thank you for sharing with us.
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Thank you for sharing the scans and collecting examples.
The Platinum Double Action is very hard to find as there are a newer(?) line of pens/pencils which share the same name. (not a Platinum collector here)
Are you sure about 1978? Mercari listings say 1979 and the magazine reads Showa 54, wouldn’t that be 1979?
What could the story of the white-button pens be? Are they some sort of prototype? The red one has a red pusher, which is unique for all versions.
Here’s a picture I made of the disassembled One-Two-Pen:
Does anyone know similar pencils (two or more simutaneously or optionally extendable refills (parallel, same orientation), perhaps even with some form of locking mechanism like here to enable mechanical pencil functionality)? It seems to be unique to me so far.
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