So I did a bit of digging, apparently the "Brigham System" pipes with the star on the stem was produced around the early 1980s onwards to 2001 when they changed to a Maple Leaf. To be honest though, I find Brigham's history, concerning their markings a bit convoluted and confusing...
Anyways, in the 80s, apparently Brigham found the cost of production too high to produce a pipe for the budget conscious smoker, here. So they outsourced to Italy for the manufacture of the "Brigham System" Pipes to meet the demand for a more cost effective pipe as opposed to the pipes that we normally associate with Brigham, being made in Canada. Pretty much everything I've read say that these smoke exceptionally cool. Having never smoked one of them, I have no idea... In any case, I've written this before having my first morning coffee and pipe and I'm still a bit groggy! If anything is unclear let me know and I'll try to answer a bit better!(Preferably after a coffee and pipe!)