CHAD stamps - collecting postage stamps on computer science

CHAD postage stamps

ID# 748	Country Chad Date 01-Nov-1985 Issue Philexafrica Format ST Face v.250 Perf.13 x 13½ Print.Lithography Category
ID# 745 click on stamp to zoom	Country Chad Date 20-Feb-1980 Issue 20th Anniversary Asecna Format SH Face v.15 Perf.12½ x 12½ Print.Lithography Category
ID# 746 click on stamp to zoom	Country Chad Date 20-Feb-1980 Issue 20th Anniversary Asecna Format SH Face v.30 Perf.12½ x 12½ Print.Lithography Category
ID# 747 click on stamp to zoom	Country Chad Date 20-Feb-1980 Issue 20th Anniversary Asecna Format SH Note pixel Face v.60 Perf.12½ x 12½ Print.Lithography Category