1928, Queen Wilhelmina 5 c. and red "Bestellen op Zontag" stamp with machine cancellation "AMSTERDAM R.STATION 12.8.28" on local preprindet cover "RADIOBRIEF" with handwritten note "Zondag bestellen" and complete letter with sender not "M/S Poleau Roebiah". The cover with traces of age, but so far the only known "Radiobrief" with Sunday delivery
