I made the mistake of assuming that the Record crank arms on my PX-10 would have been fixed to the bb spindle with typical Campy 15 mm bolts. And so I scored a peanut butter wrench off eBay.
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Pretty wrench. However, my excitement to test fit it turned fell flat when I realized that it didn't fit the bolts on the crank. It fits into threaded cavity of the arms, just not over the bolt heads.

The Peugeot originally had a Stronglight 105 crank fitted to a Stronglight Competition bb. It looks like the previous owner swapped the Campy arms directly into the Stronglight bb and used the French fixing bolts.



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Seems like these are 16 mm bolt heads. I don't know how they managed to get screwed into such a tight space, but they did. I have a 16 mm socket that I filed down several years ago to remove 16 mm bolts from a Nevar crank. And while that operation was successful, that same socket is too wide for the Campy arms. I think, and I hope that with some additional filing, I might be able to make that socket fit. t's worth a try.

If things go well, I'll be looking forward to changing the bolts out for an appropriate pair in 15 mm. Then at least I'll finally get to use this pretty wrench.