4 June 1965, Austria
WIPA Stamp Exhibition Vienna / Letter and seal
I found a stamp with a type of window which the stone mason might be making in my previous post. Gothic Architecture was dates from around 12 – 14 century and that was the era shortly after the time of the Domesday Book. These Tracery windows have complicated stonework sections which support glass as well.
This Austrian stamp is a part of the History of Letters issue, and it shows a heraldry seal with a letter.