France issued its first stamps in 1849, depicting Cérès. In 1949, they celebrated the first centenary of French stamps with a vertical strip of four stamps and a label in the middle. Two stamps were a reissue of the Cérès design, and the other two a reissue of the Marianne de Gandon design, the then current definitives. The stamps were recess-printed and the strips were printed in rows of ten.

Now it's fairly easy to get hold of such a strip but I was very happy to find a part sheet consisting of two strips last year, for you hardly ever see those (outside France anyway).