Makers mark....cannot find

Can someone help with this mark!!! Please. I am losing my mind searching.

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It’s almost certainly a personal mark of the owner, not a manufacturer’s mark. Turn it 90 degrees anticlockwise and you’ll see it’s a monogram of the letters J, C and I. Are there no other marks anywhere?

Phil

Thank you so much! that makes complete sense. I find nothing more. :frowning: