Wouldn't have thought they would have been very hardwearing unless they were staff. blue. They do it nowadays in pedestrian areas, but here it says traffic was heavy. Anyone any idea which street is referred to?
https://www.meccanoindex.co.uk/MMpage.php?MID=8633&id=1325328747
https://www.meccanoindex.co.uk/MMpage.php?MID=8633&id=1325328747