There were several types of railway stamps in use in the Netherlands. From 1914 till during the Second World War (1944) there were railway stamps mainly used for freight, but these could also used for railway express letters. In those cases the railway stamp for the express service by the railway company (10c) had to be glued on the back side of the cover.
The envelope had to be fully franked according to the rate of PTT on the top. The stamps were cancelled by the special boxed postmarks of the railway station where the letter was presented, in this case (1) Lochem in 1934.