Help for engraving ... Le portrait de Mona Lisa, la Joconde

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Good day.
Got me a print .
All that is found on it on the net -
 But with the wonderful translator could not understand, this is a copy or the original ...
 In moey engravings size does not match with that of the website.
 My sheet 468 * 310 mm. print 335 * 248 mm .
 print 230 * 162 mm.
and there - Dimension de la feuille de papier: H. 50 L. 33 cm
Dimension du cuivre: H. 33,9 L. 24,9 cm
 This is a copy of the Vatican ... or script Graveur:
François-Eugène-Augustin Bridoux (1813-1892)
Who will be some opinions ...

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DoD photo ...