Here is another example from 1stDibs:
https://www.1stdibs.com/furniture/seating/office-chairs-desk-chairs/jens...
i believe there were a few different corporate setups for Risom over the years, and this model was apparently made in a different factory than yours.
And if you are anywhere near Syracuse, NY, it looks like you could check a Risom catalog archive there:
http://library.syr.edu/digital/guides/j/jens_risom_des.htm
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