Stamps With Words And/Or Numbers As The Main Design

Lebanon
30th Anniversary of OPEC
July 2, 2007
The design shows the numeral 30 with the OPEC emblem.

On June 2, 1978 Italy issued this 170 lira stamp (Sc #1333) to commemorate the 30th anniversary of the country's Constitution.

Ireland
Centenary of the Truce of 1921
July 8, 2021
The stamp set depicts De Valera's Acceptance of Truce Terms and Announcement of Truce.

This Venda 1990 History of Writing stamp shows the text The Pen is mightier than the Sword in calligraphy font.

Here is Switzerland's May 10, 2000 70 centimes stamp (Sc #1073) commemorating the centenary of the Confederation of Swiss Women's Organizations.

Philippines
Visit the Philippines Year
March 25, 2015
The design shows 2015 on a background of colorful geometric pattern.

Bulgaria
Robotnitschesko Delo
May 28, 1987
Worker's Deed

Guernsey
The Guernsey Press And Star Anniversary
July 31, 2013
Set of six, one stamp shows the text serving the islands for 200 years.

Some of the overprints used by the Kingdom of Serbs, Croats and Slovenes (officially known as Yugoslavia beginning in 1929) for some of its territories obliterated the original designs. The two Bosnia and Hercegovina stamps (Mi #s 40, 43) shown here, are from the February 6, 1919 set featuring Kaiser Franz Joseph I of Austria.

The Cyrillic "Kraljevsto S.H.S." overprint means Kingdom of Serbs, Croats and Slovenes.

On September 14, 1988 New Zealand issued this set of four Christmas stamps (SG #s 1480-3) with Christmas carol lyrics shown as illuminated manuscript.

35c "Oh Come All Ye Faithful"
70c "Hark the Herald Angels Sing"
80c "Ding Dong Merrily on High"
85c "The First Nowell"

Switzerland
EFTA 50 Years
September 3, 2010
European Free Trade Association

Bosnia and Herzegovina (BH Post)
The 10th Sarajevo Film Festival
July 26, 2004
The design shows the numeral 10 in the form of theater lighting.

This 20 pf value (Mi #2636) from the DDR's August 18, 1991 "Literary Treasures in DDR Libraries" set of three shows Egyptian medical papyrus of herbal knowledge (The Ebers Papyrus, 1550 B.C.) from the library of the University of Leipzig.

On March 7, 2007 Finland issued a souvenir sheet of two 70 c stamps celebrating Mikael Agricola's first book written in the Finnish language. One of the stamps in the sheet, shown here, features some text from Agricola's book.

From wikipedia, "Mikael Agricola (1510-1557) was a Finnish Lutheran clergyman who became the de facto founder of literary Finnish and a prominent proponent of the Protestant Reformation in Sweden, including Finland...His first book, "ABC-Kirja", or ABC book, was a primer for reading and a catechism. It was first printed in 1543."

Bosnia and Herzegovina (BH Post)
450th years of Jewish municipality in Sarajevo
October 1, 2015
The main design shows the numeral 450 in Hebrew style calligraphy and blue color.