"The" Western Cartridge Company

Below is a page from the Nov/Dec 2012 IAA Journal.
On page 49 are photos submitted by Terry Warnock from Australia.
My question is in regards to the 2 Western primer boxes.
On one label is
Western Cartridge Company
On the other label
The Western Cartridge Company.
When was the change made on boxes (what year)?
I remember Richard Rains asking the same question 10 years ago at a cartridge show.
I looked thru Western cartridge and primer boxes that I have and all are-
Western Cartridge Company.
Bob Ruebel