Near as I can tell from the posted pictures you have Maillard CXC pedals.
My guess is that you have the 500 model that can't be repaired.
"Baldy" has an account on his blog of working on the model 500 version, sadly he does not say how he will remove the "swaged-in bearings":
It turns out the bearings are 'swaged' in at the outer edge ...
I don't know how to disassemble the axle to get access to the bearings. If there's no clear flats, or a 6 or 8 sided nut visible, then you might be looking at a one-time assembly.
Try turning the rosette-end of the shaft visible in the photos, using needle nosed pliers. I suspect it won't do anything.
However as a half-way option, try dropping some ...