Imaginary Mechs

Artwork: https://www.pixiv.net/en/artworks/11296869

Artist: https://www.pixiv.net/en/users/12655

Alternative history mechs (and some brave cows)

Source - an interesting portfolio!

Artwork: https://www.pixiv.net/en/artworks/2251910

Artist: https://www.pixiv.net/en/users/1150