On middle pic looks like bottom cup is DA....but it does not matter. I'd look for smaller ring rather changing to SA hub, something like 46/48 perhaps, or whole new crankset to make it much more usable, see this one for an example
Yeah, 46 chainring (maybe 44) definitely on the cards. Debating over whether to move to square taper vs cotterles as there’s more choice but then not as original.
Do see your point re DA bottom cup. Will have to get a better look when I actually have it in person.
Period correct square taper is not easy to find - Stronglight are quite expensive nowdays...nothing wrong with cottered ones I think, have few on my bikes, including fixed.
On middle pic looks like bottom cup is DA....but it does not matter. I'd look for smaller ring rather changing to SA hub, something like 46/48 perhaps, or whole new crankset to make it much more usable, see this one for an example