First Locomotive Built By George Stephenson 1814
Source: Scientific American August 10, 1901 page 84
"Billy"
Originally there was no smoke-box and other modifications were done after the original build.
see http://www.machine-history.com/1814StephensonLocomotive
Scientific American August 10, 1901 page 84
STEPHENSON'S LOCOMOTIVE.
The accompanying photograph represents the first locomotive built by George Stephenson, which was constructed for the Killingworth Colliery Company, in the year 1814.
After doing its share of useful work as one of the notable pioneer locomotives, it came into the possession of Sir Charles Mark Palmer, who presented it to the mayor and corporation of the city of Newcastle-on-Tyne, England, on the occasion of the centenary of the birth of George Stephenson, which occurred June 9, 1881.