TSR's 3rd Edition Chainmail Wargame Primer
4This version of Chainmail was the 2nd one that had the addition of the 15 page Fantasy Section, it came out in 1979 5 years after Original Dungeons and Dragons, and it was after the changes were made to Tolkien content. This was the version may used if they used Chainmail in their game whether it was D&D, Braunstein, or something closer to Greyhawk and Blackmoor which were really a combination of several games.
If you are wanting a copy of the Chainmail Rules for yourself I highly suggest a copy from Drivethrough RPG, I am an affiliate so a very small portion of any purchase will go towards me buying another PDF to probably talk about with store credit.
https://preview.drivethrurpg.com/en/product/17010/chainmail-rules-for-medieval-miniatures-0e?affiliate_id=912880
The Painting videos you see being shown here can be found in their original content on a YouTube Channel I for the most part paint on. I will have links to them down below.
Owlbear Video
https://youtu.be/VAawn04lIr4
Skeleton Dwarves
https://youtu.be/mLXvYYDI8r0
If you are seeing this I am uploading more of these videos twice daily so check back in