Modeled part of the room with the viewing port from The Mark of Gideon to estimate the thickness of the hull, window and theorize on how the exterior shutters might work. I had not seen anyone else attempt this so some of the data might help others.
Viewing Port Dimensions (approx): 1.32m wide x 0.825m tall
Depth from Interior to Glass (approx): 335mm
Outer Shutter Thickness (approx): 62mm or 118mm depending on how it is viewed
Glass or Transparent Metal Thickness (approx): 117mm
Middle Slide Piece Thickness (approx): 7mm
Inner Shutter Thickness (approx): 40mm