Dutch token [opgelost]

Hello,

I have recently acquired several of this token from the Netherlands. I have not been able to find any information about it.

24mm
Aluminum

From what I can find, it's a 75 years anniversary token from a store in Leiden, called de Koning. The store refers to itself in advertisements as "the woolen blanket house". It was founded in 1875, so I reckon the token is from 1950. It says that for every guilder you spend, you get a 5 cent store credit. That's all I can find about it.

I tried to dig a step further and find some backgrounds about this company.

Their 75th jubilee is mentioned in the local newspaper of Leiden:

De Leidse Courant 14-oct-1950, page 10

The same for their 85th jubilee:

De Leidse Courant 14-oct-1960, page 16

However, in both advertisements, the festivities are said to be accompanied by bonus cheques and coupons, and not coins/tokens.

It seems there also excist a similar 25 ct. piece with 27 mm diameter and a 50 ct with 30 mm , both made out of aluminium.