Not many of these dual-branded lenses were made and with no accurate data from Yashica, one can only guess the actual production numbers. Less than 3,000? Maybe slightly more or a lot less. This serial number can tell a bit of the story. The number on this lens is 350309. The ’35’ refers to the lens’s focal length, which is 35mm. the last 4 digits are simply the sequential number of lenses made up to that point. ‘0309’ means that this is the 309th lens made since the start of production (whenever that was). My guess is around mid-1960.

So, if you’re up for a challenge try tracking down this lens on the various online auction sites. You’ll quickly find out that you’ll be looking for quite a while – but it’s worth it in the end. Thanks for stopping by and be sure to check me out on Instagram at @ccphotographyai – Chris

Comments are always welcomed as I’ve learned quite a bit from reader feedback. As always, thanks for stopping by, and while you’re at it, feel free to visit my camera shop at http://www.ccstudio2380.com (CC Design Studios hosted by Etsy). – Chris Whelan

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