This Sans and Streiffe Model 601 is a Macro Optics Model. 602.
I am investigating Shusuke Kojima, a designer of Japanese astronomical telescopes. Since 1955, many of Shusuke Kojima's telescopes have been exported.
There is very little information on the telescope of Macro Optical Industry Co., Ltd. that I have. This Forum has a lot of information about the telescopes of Macro Optical Industry Co., Ltd., which will help me in my research.
Macro Optical Industry Co., Ltd(マクロ光学工業)is a Japanese optical machine manufacturer founded in March 1958 by Shusuke Kojima(小島修介) and others.
The activity period is about two years.(Mar.1958～Feb.1959)
Shusuke Kojima left the Goto Optical Manufactring Co.,Ltd(五藤光学研究所） around March 1951, and was called the Astro Service Center(アストロサービスセンター), where he personally repaired telescopes.round December 1952, he joined Asahi Optical Co., Ltd.(旭光学工業) and designed a six-inch refraction equatorial mount.
He established Astro Optics Co., Ltd. (アストロ光学)in November 1954 and exported Astro S-5 and others under the brand name of the other party（Tasco ,Akron etc.）.
In February 1958, Astro Optical Co., Ltd. stopped operations due to poor management, and Shusuke Kojima was removed from the board of directors of Astro Optical Co., Ltd.
After that, the newly established company was Macro Optical Industry Co., Ltd.
The telescope designed by Shusuke Kojima at Macro Optical Industry Co., Ltd. is different from the previous designs.
Swift 831, 838, 839 are designed by Shusuke Kojima, and they will be inherited by Takahashi Seisakusho's products.
Shusuke Kojima newly launched Nippon Telescope Industry Co., Ltd(日本テレスコープ工業). in 1959.
Then, in May 1959, Swift Instruments,Inc. Tokyo branch was established.
The Japanese trading company that cooperated with the establishment of Swift Instruments,Inc. Tokyo branch was Associated Manufacturers Agency Co., Ltd（相互産業）. Originally, Nippon Telescope Industry Co., Ltd. was supposed to supply telescopes to Swift, but Shusuke Kojima died suddenly(Jun.1960), and the management of the company was disrupted.
Therefore, Takahashi Seisakusyo Ltd.(高橋製作所) was requested by Swift to manufacture the telescope of Nippon Telescope Industry Co., Ltd.
In Japan, there are almost no complete telescope products from Macro Optical Industry Co., Ltd.
I am glad to see Sans and Streiffe Mod. 601 to see the whole picture of Macro Optical Industry Co., Ltd. and to see the transition of Shusuke Kojima's design.
This Sans and Streiffe Mod. 601 was manufactured between 1958 and 1959.