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Just a little internet research looks like the Goronok cellos are American made and began about 1997. And it looks like you are correct, these are higher end quality cellos. The prices I have seen are north of $10,000.
I did read a comment on the Internet Cello Society forum about Goronok about their sound as "...different under the ear than they do away.... more so than many cellos. Both of them sounded extremely metallic and edgy under the ear, though 10 feet away they sounded great."
Well, I don't know if this is much help to you. And unfortunately I don't know a lot about cellos.
I always consult my local luthier for all my questions about string instruments. He is extremely knowledgeable.
- Pete -
I can still find info online for Goronok String Instruments in Cleveland, but it seems to be outdated information. One luthier that might know more about him is Peter Horn. He's a local and been around forever. I think his website lists his cell number. Emailing is no use for him personally unless his sons respond for him now, but he will answer his phone.
World's Okayest Fiddler
I love instruments that have a cool story behind them!
My violin actually was made in China but it is called a Bourree Cathedral. My luthier picked it up in a warehouse somewhere in California...
He still remembers my violin and how he obtained it. He knows all about the wood it is made of and where it is from. He matched the strings its tone and he put in the bridge. I just love knowing the story behind it.
- Pete -