The Skyscraper BCS was manufactured for Bond & Bond Ltd by Various in 1937.

1937 Skyscraper 7-valve + eye, all-wave set.

Valves (7): 6K7, 6C5, 6K7, 6K7, 6Q7, 6F6G, 80 and 6G5 Magic Eye

Intermediate Frequency: 460kc/s

Frequency Bands: 3

Chassis Notes(most schematics can be clicked to download a full size version)

1937 7-valve + eye.  6C5 in the oscillator replaced by 6C5G in later models.  Used in multiple different models 

Ultimate BCU Schematic

All documented models using this chassis (6 in total)

1937Ultimate BCU
1937Golden Knight BCS
1937Skyscraper BCS - this set
1937National BCU
1937Rolls BCR
1937Courier BCC