While a capable locomotive for the day, its technology was somewhat antiquated compared to George and Robert Stephenson's Rocket, the winner of the Rainhill Trials and the £500 prize money.

At the Rainhill Trials, Sans Pareil was excluded from the prize because it was slightly over the maximum permitted weight.

[1] Nevertheless it performed very well, but had a strange rolling gait due to its vertical cylinders and the draft from the blastpipe was, in Hackworth's trademark style, very strong, so most of the coke was expelled out of the chimney unburnt.

In the late 1970’s, the company L-S LOC AG in Basel (Switzerland) built several live steam models, also the Sans Pareil in several batches of 500 pieces.

This loco was built by the North British Locomotive Company at Glasgow in September 1927 and withdrawn in October 1963 as 46126 Royal Army Service Corps.