 The B class locomotives were designed by Sharp Stewart & Co. of Glasgow and built by them, their successors North British Locomotive Company (NBL, Glasgow), and three each by Baldwin Locomotive Works (BLW, Philadelphia, USA), and the DHR works at Tindharia.Number 778 (originally No.19) was built in 1889 by Sharp Stewart & Co at the Atlas Works in Glasgow.It is the only DHR locomotive that has been taken out of India.