Pre WW2 Dutch gasmask No.1

As far as I know this is a pre-war Dutch gasmask.
Mask is marked with “vredestein holland”.
Still all straps are present as also the filter.
Everything in light used condition.
The filter still has the paper label that reads “Voor gebruik oliepapier afscheuren en sluitdop verwijderen”.
Translated to English this is something like “Before use, rip out the oilpaper and remove the close plug”
Markings: mentioned in text