The 800 class of locomotive were introduced in 1956 with all units now retired from service.

For high speed runs an electric locomotive class, the E 18 was also used.

In France the 4-8-0 wheel arrangement was used on two locomotive classes.

After the letter was a number, which was unique to a particular class of locomotive.

Generally the wheel arrangements were 2-2-0 and 2-2-2 for most classes of locomotives.

Two separate classes of locomotives have carried the designation Class 70.

Withdrawal of this fine class of locomotive began in the following year.

It was the most numerous steam locomotive class in Finland with 161 built.

It therefore has a claim to being one of the most numerous steam locomotive classes in the world.

They were the first standardized class of locomotives on the railroad and shared many parts with other standard classes.