


As far as I know, this was a gesture towards those who wished to respect the socalled Sunday rest. Like you mention, in those days mail was also delivered on Sundays, but if you objected on religious grounds, leaving this tab on the stamp would ensure the mail was not delivered on Sunday.
In the Netherlands there was a similar policy, only it was the other way around: you needed to add a label to your letter or card that said the mail could also be delivered on Sundays. In other words, the standard way of working was that mail without the label was delivered on Monday. The use of these labels never really caught on and the Sunday delivery service slowly phased out. At first, it only remained in the larger cities and around 1940 it was stopped altogether.
Thanks Jan-Simon. Your explanation makes sense, Michel
I remember that interesting bit of history!
I wonder if someone can explain why on some Belgian stamps , such as Y&T 68 - Scott 76, there is a tab in French and Dutch saying 'do not deliver on Sunday'.
Was it possible that some mail must not be delivered that day and others could be? At that time mail was delivered on Sundays. Since I collect stamps, some 73 years ago it was a mystery to me, and now I dare ask the questions - nerver late. Michel

re: Belgium
As far as I know, this was a gesture towards those who wished to respect the socalled Sunday rest. Like you mention, in those days mail was also delivered on Sundays, but if you objected on religious grounds, leaving this tab on the stamp would ensure the mail was not delivered on Sunday.

re: Belgium
In the Netherlands there was a similar policy, only it was the other way around: you needed to add a label to your letter or card that said the mail could also be delivered on Sundays. In other words, the standard way of working was that mail without the label was delivered on Monday. The use of these labels never really caught on and the Sunday delivery service slowly phased out. At first, it only remained in the larger cities and around 1940 it was stopped altogether.
re: Belgium
Thanks Jan-Simon. Your explanation makes sense, Michel
re: Belgium
I remember that interesting bit of history!