What's the old chainset?
I need to do some research on that, it's a triple and French.
I believe those Olmos came with Campag Mirage from the factory. Not sure why the old owner made a mishmash group for it?
Suntour rear, Campag front, Shimano shifters, French chainset...
Looks like a Stronglight 80 or 100. Best quick check is the BCD, those cranksets use 86mm BCD which is very weird. If that's the case I'd be interested in the chainrings (and cranks) as my tandem uses them and I'm looking for spares!
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What's the old chainset?