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Excellent, thanks for the information about the different cranks! I appreciate that.
Ah yes I forgot to tell you, I checked the left/right handedness of the threads when trying to fit the pedals. What I did remember is that these cranks are rebranded as Peugeot, so could have french threads? If not then the only other thing could be knackered threads; I'll source some pedal taps and try it that way.
@littleK see above!
dirac
Scilly.Suffolk
144mm is the track standard, but that means 3/32" rings are less common (although you can run mixed 3/32" and 1/8" sprockets using a 1/8" chain).
135mm is the Campag road double standard, so suitable (long teeth, no ramps or pins) rings between 42 and 52 are less common.
130mm is the Shimano road double standard, so... [see Campag].
110mm is the compact road double standard for both Shimano and Campag (but Campag have the hidden bolt offset so aren't compatible with Shimano), so suitable rings between 34 and 50 are less common.
And plenty of others which are either obsolete, obscure or both.
:)
That being said, suitable rings in all BCD do exist so nothing is impossible... for a price.
Shimano 130mm BCD are by far the most common, so older road cranks are cheap and suitable rings easier to find.
But you have cranks, Hilary Stone has rings and tapping a thread is easy to do at home/cheap to get done assuming there is enough material left in the eye.
Apologies for repeating something you surely know, but you didn't reply when I mentioned it before: the NDS pedal screws in anti-clockwise. The thread is definitely FUBAR?