The NS 3851–3855 was a series of locomotives was in service at the Dutch Railways shortly after the Second World War.

As a successor to the P6, the Prussian P8 was developed by Robert Hermann Garbe.

The locomotive was built by the Berliner Machinenbau AG and was intended for the Königlich Preußische Staatseisenbahnen (K.P.St.E.).

The first locomotives initially showed some weaknesses, such as wrongly dimensioned connecting rods and a tender that ensured that the locomotive could not run faster than 45 km/h backwards.

Over the years, various adjustments were made to the P8, such as the use of a DB tender (wannentender) for the P8, which greatly improved the running characteristics of the locomotive backwards and which was now able to achieve a speed of 85 km/h running in reverse.