This is a rare, original industrial photograph featuring a North British 330 hp 0-4-0 diesel-hydraulic shunter, specifically identified as D2903. Subject: A classic example of British industrial engineering, built by the North British Locomotive Co. Ltd. in Glasgow.Location: Used for heavy shunting duties within the vast Singer factory complex, a landmark of Scottish industrial history.Era: Circa late 1950s/early 1960s.