I spotted this Warn hub brochure out of Canada on eBay. It’s not I have documented. Its 1954 date makes it a fairly early one for the locking and automatic hub models.
This is the front of the brochure:
The is the back of the brochure:
If you open from the back, it reveals this page:
The this page opens horizontally again to reveal the interior three pages (8.5″ x 11″)
This is the back of the fully opened brochure.