Mattel International Logo
The Mattel International SA logo would suggest that it was made for use outside the USA, and probably no later than 1968 (by 1968-9 Mattel was setting up local branches in quite a few European countries).
Mattel International 1968 Catalog
The Belgian example of this international catalog features several MMM items with captions in French and Flemish along with the Mattel International logo.
Mattel International Printing Plate for Newspaper Advertising
This hard plastic printing plate intended for use in
single colour newspaper advertising was found in a Belgian toy store.
Mattel International 1969 Promotional Brochure
This is a straightforward 8-page brochure containing one page on each main Mattel toy line. Although signed by Mattel Toymakers, all texts in this brochure are in black only for easy translation/adaptation. No doubt this same brochure saw use in other markets and for various possible occasions.
This particular example is in french, there are also known copies in a flemish version.