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My name is***** am a Personal Property Appraiser and would be happy to assist you with your question.
In excellent condition your Coalport china in the Leighton Sprays pattern with gold rims would have an insurance value of 4,250-4,500USD.
These are retail values for the set in excellent condition. If there are any damages to the china including cracks, chips or any missing gold on the rims this would devalue the china.
If you were looking to resell the set a fair market value would be between 40-50% of the insurance values presented in good to excellent condition in a secondary market setting.
I hope this information was helpful to you today,
Best of luck with your vintage Coalport china,
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