Bottom row, 7th from left, looks like a tailstock revolving centre, has ball race inside. It spins with the work, whereas the plain centres shown need lubrication when used.2nd from right, bottom row, looks like a half centre to allow end – turning/ facing of work. Big fat one, far right could be MT3? and 7th from right so thin, could be MT1 and the rest of the taper shanks probably MT2.4th from right appears to be a conversion sleeve with a tang on the tail end, possibly MT2 outer and MT1 internal taper. Same goes for 4th from left.
John