You're right, Matt, the Kepi had been replaced by the beret for service dress by the time these photos were taken. The kepi was reserved for dress uniforms after 1959 (those photos were taken in the early 60s, right at the end of the war).
But the men of the Legion are so emotionally attached to the kepi that they carried on wearing this item of parade dress with their combat uniforms, even though regulations forbade it.