6  x skylights with scuttles protected by steel bars 1400 x 1200 mm
6  x skylights with scuttles protected by steel cover 1400 x 1200 mm (after 1941)
6 x skylights without scuttles 1000 x 1400 mm
6 x skylights without scuttles 1000 x 1600 mm
6 x skylights with 4 doors without scuttles 2500 x 1400 mm
6 x skylights with 4 doors without scuttles 2000 x 1000 mm
6 x skylights without scuttles 1000 x 1600 mm