How about these.! https://www.ebay.co.uk/itm/Vintage-NOS-1950s-Granby-Alloy-Cranks-And-Chainring-Lytaloy-Holdsworth-Allez-/203740829509?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=710-127635-2958-0
Granby Cranks
Never seen anything like that before.........I wonder if there's some reason aluminium cottered cranks didn't catch on?
Steel cotters being a bit harder than the aluminium, stretched the holes and eventually split, several around with nasty cracks.
@clubman started
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How about these.!
https://www.ebay.co.uk/itm/Vintage-NOS-1950s-Granby-Alloy-Cranks-And-Chainring-Lytaloy-Holdsworth-Allez-/203740829509?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=710-127635-2958-0