Do you think the streets are still cobbled in that photo? I've wondered that myself but the resolution isn't high enough to zoom in that far. Motor vehicles were pretty common by 1933 so they might have re-surfaced them by that time. Or most of them anyway.

I've checked when they have dug up the road and it does seem they did remove the cobbles before putting down the new surface except for a couple of lines of them next to the gutters which are still on view.