The first notable thing about this lens is the polished aluminium finish and an overall appearance that evokes the style of the late 1950s. Even the designation of the lens, referring to the focal length as 5.5cm as opposed to the more usual 55mm, is a throwback to even pre WWII production. After WWII most lenses have been described in mm. The Auto Yashinon was actually released in 1964 as the standard lens for the Yashica J-5 SLR and was very briefly reviewed in the October 1965 edition of Photography. So, 54 years later, let’s have another look, this time using the Pentax K-1 36MP DSLR and Pentax Adapter K so the M42 screw fit lens can be fitted to the bayonet camera body.
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https://www.ephotozine.com/article/yashica-auto-yashinon-5-5cm-f-1-8-vintage-lens-review-34311