Topic: Help identify Red Cliff Ironstone pattern, age and value

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Hello,
I have searched the internet and Replacements.com but I can not find this pattern. I have not been able to find a Red Cliff mark like this either.  The tureen is about 14 inches wide(edge of handle to edge of handle) by 8 1/2 inches deep and 10 1/2 inches tall (to top of knob). I am attaching a photo of the mark and the tureen. Any help with the pattern, value and age is appreciated. We read the mark to say Red Cliff Ironstone Mar 20          2

thanks so much