Hi Vairochana,
Looks just like an Investarms .50 cal. that I have. The stock is walnut, nose cap, trigger guard, and patch box look the same. The stock on mine is a high gloss and the barrel has a highly polish blue job. there is an " I " and Investarms, and made in Italy on the barrel. The name Sile is also on the barrel, which I believe was the distributor in New York. The box that it was in said Deluxe on it. Sorry can't give you a price, I inherited it, along with a .54 cal., this has an oil finish walnut stock and regular round patch box. Both have 28” barrels and 1 in 48 twist. Both were unfired when I received them.
Hope I was of some help
Yagee :thumbsup: