File:Electric frame signalbox at London Bridge, Southern Railway (CJ Allen, Steel Highway, 1928).jpg
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Size of this preview: 800 × 580 pixels. Other resolutions: 320 × 232 pixels | 640 × 464 pixels | 803 × 582 pixels.
Original file (803 × 582 pixels, file size: 97 KB, MIME type: image/jpeg)