Help with attribution and evaluation of the sketch

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Good day. Sorry that first post after registering immediately for assistance.

  Helped to identify with the artistic and the market value of the thumbnail pictures Ribera. Oil on canvas, size 450 * 360. The work is very beautiful, good condition. No signature, on a stretcher, traces of the destruction of 3 lines of a text. On the back of the preserved piece of wax seal "Imperial Hermitage is located partly on a stretcher, partly on the canvas.

  As a family legend that picture long ago beat someone in card scampish grandfather, shame on the family, love of life and rake. Recently, after the death of his grandfather, she inherited inherited my friend. He argues that 5 years ago saw that the wax seal of the Hermitage was a full-size.

 Your opinion?