Nice looking pipe, I'm sure it'll smoke well for you! The 1963 attribution by the seller is wrong. Peterson's wasn't appointed the US Barling distributor until May of 1966. They held the role some 11 years until distribution was taken away from Peterson's and given to Wes Myer's in the summer of 1977. More importantly the Brigadier model was introduced at the very end of 1971, so your pipe dates from the 5-6 years between December 1971 and August of 1977. See below for promotional copy (not, I suspect, to be taken literally) prepared for a trade notice published at launch:
View attachment 150926
United States Tobacco Journal December 16, 1971