“When was the OHTO Piston sold?”
I posted this question on X, and user @Hsi-chi did not disappoint:
Image Source: Japanese Stationery Chronicle
Here is a Googe Translated version:
Translation Text:
“A mechanical pencil with a new mechanism that advances the lead with a half-knock and stores the lead inside with a full knock. It features a double mechanism that bites the lead to feed and pull it back. Five models were released at once, ranging from 500 to 3,000 yen.”
I also was able to find this on the OHTO Japan Wikipedia page:
“In 1981, the company developed and released the world’s first “Piston Sharp” with a piston mechanism. It was released with the tagline “The birth of an amazing mechanism” and allowed the lead to be advanced with a half knock and the lead to be stored with a full knock. Five types were sold, ranging from 500 yen to 3,000 yen. Later, in the early 2000s, Mitsubishi Pencil released the “Returns” with the same mechanism.”
OHTO Piston – all 5 models were released in 1981
SP-5 (¥500) Colors: red, green, black, brown and blue
SP-10 (¥1,000) Colors: I have seen black, blue, and red (maybe others?)
SP-15 (¥1,500) Colors: I have seen blue (maybe others?)
@cytherian has a great post on the SP-15
SP-20 (¥2,000) Black enamel I have only seen black
SP-30 (¥3,000) Steel with black stripes I have only seen black stripes (maybe others?)
I have also seen what I am calling the SP-20 and SP-30 referred to as SP-2000 and SP-3000 by other collectors.
Does anyone know when OHTO stopped selling these models?
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