1930s
Peterson's System 3 and
357 stamped on the shank
K&P Peterson's of Dublin stamped on the electro-plated mount with the typical Peterson's trio of Irish symbols (shamrock, wolfhound and tower)
1939 Rogers Imports Ltd. advertisement for the Peterson's System Pipe
(Rogers Imports were the sole US agents for Peterson pipes from 1939 to the late '60s. They manufactured brochures exclusively for the US market and were instrumental in helping Peterson's popularity in the US)
+ Rattray's OLD GOWRIE:-