Hi Jason,
The hardware on the pistol is definitely European and probably from the 17th century. The name "tunato lazarino" could be Fortunato Lazarino Cominazzo who was a famous barrel maker in Brescia, Italy during the 17th century. Many in his family were imprisoned or executed after an uprising against the government of Venice in 1696. Unfortunately there are many fake Cominazzo barrels out there and I am suspicious because the barrel doesn't say Cominazzo. The was also a Lazarino family of Italian gunmakers during the same time, but I have never seen a reference to a Tunato or Fortunato Lazarino. I can't make out any complete words from the engraving on the lock plate. However, it is definitely from the 17th or very early 18th century. I'll bet it has no internal bridle for the tumbler. The stock is very ungainly and not typical of the slim and elegant Italian pistols I have seen. Most of those pistols also did not have nose caps. I wonder if some colonial or provincial maker (maybe in America) assembled a crude gun from the old parts.
dave