The 1868 Steam Locomotive Class C1s used in the Grand Duchy of Finland, an autonomous part of the Russian Empire until 1917, were typical of the Victorian principles of locomotive design and the British 0-6-0 of the period, with inside cylinders and Stephenson link motion.

The wood-burning smoke stacks and wooden cab sides were installed for Finnish conditions.

Neilson and Company also supplied a number of similar 5-foot-gauge 0-6-0s to other railways in the Russian Empire, but few photographs and drawings remain.

No.1427 at the Finnish Railway Museum is the only preserved example, and is the only surviving example of the varied 0-6-0 types that were once common across the Russian Empire in the 19th century.

[2] It was the first freight locomotive for Finnish Railways, then called SVR.