The Pasteur series is a French definitive issue honouring Louis Pasteur, one of France’s most celebrated scientists. Issued mainly during the 1920s, these stamps were produced in multiple denominations for domestic and international postal use. The series is noted for its numerous colour shades, print types, papers, perforations, and postmark varieties, offering rich scope for study of nuances, usages, and cancellations within everyday French postal history.
