Original Edition Campaign: The Supplement You Probably Never Heard Of

It's a handy little supplement for anyone who enjoys the original Little Brown Books or their clones.
You can pick it up on Amazon: https://www.drivethrurpg.com/en/product/258650/the-armory-1st-edition
And my favorite retroclone of the the White Box is also on Amazon: https://a.co/d/a5uK9J2