"Copied Stradivarius 1734" indicates that the violin is a copy of a Stradivarius violin made in 1734. Stradivarius is one of the most famous violin makers in history, and his instruments are highly sought after and can command very high prices. However, it is important to note that a copy of a Stradivarius is not the same as an original Stradivarius, and its value will be significantly lower.
The value of a violin copy will depend on a number of factors, including the quality of the copy, the reputation of the maker, and the demand for copies of Stradivarius violins. It is difficult to provide a precise estimate of the value of a violin without seeing it in person and having it evaluated by an expert. However, it is possible that a violin marked "Italian Violin Copied Stradivarius 1734" could be worth anywhere from a few hundred dollars to several thousand dollars.