Need help- ID Soren-style dining chair  

I recently bought two dining chairs from a local retro resale shop. I thought I was told these were Paul McCobb, but cannot find anything on the web like these chairs under the search term "Paul McCobb" chair. They are like Soren chairs, but the legs meeting the arms are different, but the spindle back does extend below the seat. On the bottom of the seat it says "1030" in pencil and then stamped "Sep15 1958".
Any help would be appreciated!
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