Originally Posted by
Salubrious
Being that its on a Raleigh, its likely that the Nervar crank has British threads (9/16" x 20tpi).
I would pop the dust cap off and give the pedal a shot of WD 40 and see if it will free up.
I've taken the pedal apart and the cone nut edge is very worn and about 20% of the thinner lip has worn off leaving a small bulge the bearings catch on. I managed to smooth it out and polish it, and the pedal seems to work ok for now, but the day may come when it'll act up again.
Thanks for the tip on the "D" & "G" stamping, that'll come in handy.
I did an hour of searching on this site so I know there are a few guys who have my bike, so fingers still crossed that they'll confirm one way or another.