Set of 6x large and 6 x small Dutch Fire brigade uniform buttons

Set of 6 x large and 6 x small Dutch Post WWII brass fire brigade uniform buttons.  6 large brass buttons showing a latter, a fire worker helmet, a rope, a pike and an ax over a smooth back ground. The reverse side is marked M. KRAAYER KZ, WORMERVEER.. 6 small buttons showing the same attributes and the reverse side is marked A and A&S and 15 m.
Used by the fire department of Purmerend in the Netherlands around 1950