Hi Planner

Your correct "Made for Donald Mackintosh Melbourne"

He owned this shop until the 60's I think.

Script is on the right barrel as you suggested.
Donald Mackintosh won the live pigeon shoot at the Paris Games of 1900.
I think William Powell now have their shotguns made in Spain which is kind of sad I feel.
I'm told at some stage Donald Mackintosh also imported Greener shotguns.