C. Benolt raised fish oil painting

I have an original C. Benolt raised oil painting.  This painting is of a beautiful seascape.  I obtained the painting through an estate sale and have been told the raised paintings are very rare.  I am looking to get an actual certificate appraisal, for we have been told this painting could be worth thousands.  We would like to get a more professional opinion on what it is actually worth.  The painting itself is 12x16 and is in its original frame.  Thank you. 

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