I don't know much about these early 80's EKO semi-acoustics but Jack Marchal at the Fetish Guitars site can probably tell you something. He has a 1982-83 EKO catalog posted that pictures a Model C29sb so I think your late 70's early 80's date attribution is about right.
Here's a link to the catalog page:
Jack might be interested in posting pictures of your guitar on the website. I think you will get much more help from him than the current EKO company. I think they essentially purchased the rights to the brand name and really don't have much connection to the original company. Although some current EKOs are still built in Italy, many of them are built in the Czech Republic, Asia or Spain.Statistics: Posted by VintAxe — Sun Apr 19, 2009 2:36 pm
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