James MacArthur was established in 1982 with the aim of selecting whiskies from Scottish Distilleries which were either not very well known. Cask strength whiskies are bottled at natural strength and without the whisky having been chill-filtered or having colour added. The 43% bottlings, although reduced in strength, are similarly non chill-filtered and have no added colour. They are bottled many whisky miniatures.
The main series of James MacArthur's is the 'Old Masters' range (spelled as 'Old Master's' with an apostrophe).