The 927 Class or Coal Goods was series of 20 0-6-0 freight engines designed by Joseph Armstrong

Joseph Armstrong (engineer)

Joseph Armstrong was a British locomotive engineer and the second locomotive superintendent of the Great Western Railway...

 for the Great Western Railway

Great Western Railway

The Great Western Railway was a British railway company that linked London with the south-west and west of England and most of Wales. It was founded in 1833, received its enabling Act of Parliament in 1835 and ran its first trains in 1838...

, and built at Swindon Works in 1874.

The locomotives

Numbered in the series 927-946, the 927s were essentially a variant of Armstrong's own Standard Goods (388) Class

GWR 388 class

The GWR 388 class was a large class of 310 0-6-0 goods locomotives built by the Great Western Railway. They are sometimes referred to as the Armstrong Goods or Armstrong Standard Goods to differentiate from the Gooch Goods and Dean Goods classes, both of which were also large classes of standard...

, with driving wheels of 4'6" rather than 5'0" diameter. They were specifically designed for the heavy trains between Pontypool Road and the Mersey that conveyed Welsh steam coal to the transatlantic shipping lines. (Previous GWR classes used on this work were Daniel Gooch's 79 Class 0-6-0s, and Gooch's later 0-6-0s built by Beyer, Peacock, the 322 Class).

Most of the 927s were allocated to Birkenhead shed, and they were withdrawn between 1905 and 1928.