Sanctus Seraphin Violin A.D. 1742 - Real or Copy?

Violin Maker's label: Sanctus Seraphin Utinensis Fecit Venetijs Anno 1742. Translated it means:"Sanctus Seraphin of Udine made in Venice in the Year 1742". Sanctus Seraphin (Santo Serafino) (1699-1758) from the town of Udine was a successful violin maker working in Venice . His instruments are finely crafted and tonally excellent. If this is not a German made copy of the 1800's, it is of great value.
Even a Sanctus Seraphin copy in good condition such as c.1880 Santos Seraphin copy of probably Tyrolean origin is quoted at US $ 19,500.

From : The Violin - Its Famous Makers and Their Imitators -by George Hart -1909:

"SERAFINO, Santo, Udine—Venice, 1710-48. This maker is chiefly famed for the exquisite finish of his workmanship. The modelling of his instruments varied. There are instances, particularly in the case of his Violins, where he has entirely set aside the Stainer form, and copied Amati. These Violins are wonderfully like the work of Francesco Ruggeri. The varnish upon them, of a rich red colour, is of so exceptional a quality, that one is compelled to look twice before being satisfied as to the author. The greater number, however, of his instruments are of the German character, the sound-hole, scroll, and outline all hinting of Stainer. These Venetians were wonderfully fortunate in obtaining handsome wood, and in this respect Santo Serafino was pre-eminent, for his sides and backs are simply beautiful to perfection. His method of cutting the wood was invariably to show the grain in even stripes. The scroll is well cut in point of workmanship, but the style is poor. Santo Serafino cannot be regarded as having displayed originality in any shape, and he thus forms an exception to the great majority of Italian makers. His instruments are either copies of Amati or of Stainer; there is, of course, a strong Italian flavour about his Stainer copies, which lifts them above the German school of imitators, and hence their higher value. Nearly all his instruments were branded with his name above the tail-pin. He used an ornamental label of large size. "