Are these calipers the early ones or later ones?

[BReyes]

Are these calipers the early ones or later ones?

Thanks

[BReyes]

[djpateman]

Too small of a photo to tell. What is the bolt spacing on the caliper mounting bolts? 3" = M , 3.5" = A (late type)
If the fluild line goes into the back at the center of the piston, then it is M. If the line goes in the bottom between the mount bolts then it is A.