It is immaterial whether the defendant knew the identity of the owner of the property. Commonwealth v. Peruzzi, supra at 442 n. 4. See Commonwealth v. Hosman, 257 Mass. 379, 384-385 (1926). The evidence clearly warranted the judge in finding beyond a reasonable doubt that the defendant's destructive acts were by design and were hostile to the owner of the booth.

In addition, the judge in his charge did not instruct the jury that they had to find that the gun's value was in excess of one hundred dollars. We do not consider that the common experience of jurors enables them to assess the value of a gun, compare Commonwealth v. Hosman, 257 Mass. 379, 386 (1926), and Tracy did not admit that its value exceeded $100. Compare Commonwealth v. Camelio, 1 Mass. App. Ct. 296, 302 (1973). The value of the property stolen determines the punishable offense under G.L.c. 266, § 60. Even in the absence of a request, the jury must be instructed on this point.