Biomechanics tattoo - Another interesting way of looking at biomechanics that keeps the human silhouette intact. A few interesting shapes may be made from using the human skin as somewhat of a shell.
Biomechanics & H R Giger
SteamPunk machine arm tattoo
Insane bio-mechanical ink!
Tattoo's & Tattoo Ideas
Steampunk Rose tattoo - down the spine or an interesting idea for a sleeve
3D mechanical arm temporary tattoo stickers by lovetatoo on Etsy, $11.50
NOVA BIONICS Arm, Georg Löschner on ArtStation at http://www.artstation.com/artwork/nova-bionics-arm
I'm getting something like this for my shoulder piece and it'll say "Attune your ears to the grinding gears" ♡
Mechanical Eye Mens Awesome Bicep Tattoo Designs
WOW! If it had just a little better "depth" / 3D aspect to it - that would be an incredible piece to get done.