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MoTET is an Open-Archive Site Devoted to Research Into The Origins of Personal Computing
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. . . and Preserving Yesterday's Technology, for Tomorrow.
3/18/64
March 18, 1964
Source: Dentaku Museum (no reference, no source given)
"Announcement; Price Undecided"
3/19/64
March 19, 1964
Below is a translation from announcement made in the Nihon Keizai Shimbun newspaper on March 19, 1964 (no picture came with the announcement):
"The specifications of this calculator are 20 calculated digits, 80 calculation speeds per second, 60 subtractions, 2.5 multiplications, 1.2 divisions, and a weight of 25 kg. This is faster than an electric tabletop calculator and has no noise or vibration at all. The price is around 500,000 yen each, and the initial monthly production target is around 300 units."
Source: Dentaku Museum
May 14, 1964
Online claim (no reference, no source given)
"Announcement"
May 29, 1964
Source: Dentaku Museum (no reference, no source given)
"Newspaper advertising; Price undecided"
7/31/64
July 31, 1964
(clipping is from an unknown newspaper)
This is the Launch Date with first units sold
"535,000 yen" "Contact Hayakawa Electric Tokyo Branch Special Machinery Sales Department."
Source: Dentaku Museum
(Below)
October 20, 1964
Source: Dentaku Museum (no reference, no source given)
"Newspaper article; Kusuda Office Machine developed a desktop calculator in cooperation with Hayakawa Electric and released under the name of Sharp Compet."
October 31, 1964
Source: Dentaku Museum (no reference, no source given)
"Newspaper advertising; Distributor Kusuda Office Machine Co., Ltd., Kanematsu Office Machine Sales Co., Ltd. "
January 15, 1965
Source: Dentaku Museum (no reference, no source given)
"Newspaper advertisements have been extremely well received since their launch in July of last year, and have already been delivered to more than 700 leading companies nationwide in six months."
February 14, 1965
Source: Dentaku Museum (no reference, no source given)
"Newspaper advertisements delivered 1000 units in a short period of time. A flood of orders from large companies and shops! There is no end to inquiries from overseas."
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