No, it's what I think to be an Easter egg for The Elder Scrolls 6 that I found. I'm not sure if anyone else found it, or if the correlation between this and the possibility of TES 6 was even intentional, but it's there.
https://www.youtube.com/watch?v=Ry76Svz-5ZU
It's in Diamond City's market near the benches and stuff.