On eBay USA at the moment is listed a King 35 mm Daylight Loading Tank. I had never heard of this tank before. The plastic and box look fairly modern, 1970s maybe.

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Google searches revealed little, just a few photographs in the Pentax Users Forum. These are pinned on my Pinterest board (link in menu above). The box shown there has the manufacturer’s name: Asanuma & Co Ltd. Asanuma & Co of Tokyo were shown as the Japanese agents for Paterson system 4 tanks. Another internet source says that company was or is wholly owned by Tokina.

So, there was a Japanese rival in the 35 mm daylight-loading tank world to Agfa with the established Rondinax and Rondix systems.